🚀 Built for Load. Engineered for Code. Trusted for Decades. 🚀
Construction & Infrastructure Fasteners: High-Strength Bolts, Screws, Nuts, Anchors & Structural Hardware for OEM Applications
Structural Load
Extreme strength demands.
Compliance
Code-driven specifications.
Durability
Efficiency
Navigating Construction & Infrastructure’s Toughest Fastener Challenges with CSG Precision
Structural Bolt & Anchor Performance
High-load fastening systems.
Corrosion & Weathering Resistance
Specialized coatings and alloys.
Building Code & Seismic Compliance
Region-specific standards.
Job Site Assembly & Supply Chain
Pre-kitted delivery and VMI.
From high-rise steel framing and highway bridge construction to residential foundations and seismic retrofit projects, the construction and infrastructure sectors demand fasteners, bolts, screws, nuts, anchors, and washers that perform under extreme structural loads and harsh environmental conditions. CSG’s expertly engineered C-parts and fastening systems are designed to tackle these critical challenges head-on, ensuring code compliance, structural safety, and long-term durability across every phase of the build.
Combating Corrosion, UV Exposure & Thermal Cycling on Construction Sites
Moisture, UV radiation, thermal cycling, and salt spray are relentless threats to fasteners, bolts, and anchors in outdoor construction applications. Standard carbon steel hardware corrodes rapidly on exposed job sites, weakening connections in prefab wall systems, steel framing assemblies, and exterior panel installations—three of the most common application areas where fastener degradation leads to costly rework and structural risk. CSG overcomes corrosion and weather exposure with corrosion-resistant finishes, weather-sealed kits, and protective coatings engineered for decades of outdoor performance. Our top C-parts for these applications include anchor bolts with advanced anti-corrosion plating, exterior-grade screws with ceramic or zinc-flake coatings, and structural washers built from marine-grade stainless steel. For legacy infrastructure where aging component specs no longer match current supply—such as façade retrofit, elevator modernization, and heritage building repair projects—we provide cross-matching support, legacy spec revalidation, and second-source stocking of multi-fit brackets, dual-thread anchors, and universal washer kits that restore structural integrity without costly redesign.
Meeting Seismic & Structural Load Demands with Code-Based Fastening Systems
Large-scale construction projects—from commercial high-rises and parking structures to highway bridges and industrial plants—demand structural fasteners capable of withstanding immense static and dynamic loads, shock loading, and seismic forces while meeting stringent safety codes such as AISC and ASTM standards. The failure of a single structural bolt, anchor, or nut in a load-bearing connection can compromise an entire assembly, leading to catastrophic structural collapse. CSG delivers load-rated fasteners, certified seismic hardware, and full testing documentation to ensure every connection performs under the most extreme conditions. Our top C-parts for seismic and structural applications include seismic lag bolts engineered for dynamic cycling, baseplate anchors designed for high-tensile foundation connections, and structural clips that provide reliable shear transfer in steel-to-steel joints. These solutions serve critical applications in foundation reinforcement, high-rise structural frames, and modular infrastructure where code-based load requirements and shock loading resistance are non-negotiable.
Navigating Regional Building Codes, Seismic Categories & Specification Complexity
Construction fastener requirements vary significantly by jurisdiction—national codes (IBC, ASCE 7), local amendments, seismic design categories, and fire ratings all dictate specific bolt grades, anchor types, and installation methods. OEMs manufacturing prefab wall systems, steel framing, or modular construction components must ensure every screw, bolt, nut, and anchor meets the code requirements of every region where their products are installed. Non-compliance triggers inspection failures, project delays, and legal exposure. CSG simplifies code compliance by supplying region-compliant parts, pre-kitted hardware organized by jurisdiction, and supplier audit support that documents full specification traceability. Our top C-parts for multi-region compliance include code-specific anchors with ICC-ES evaluation reports, certified screws tested to jurisdiction-specific requirements, and structural brackets approved for regional seismic design categories. These solutions directly support regional builds, permit-submitted installations, and code-inspected framing—ensuring every fastener passes inspection on the first attempt across every market you serve.
Eliminating Job Site Delays with Pre-Kitted Fastener Packs & Streamlined Supply
On active construction sites, lost time from missing fasteners, mismatched hardware, or unorganized inventory translates directly into cost overruns and schedule slippage. Crews searching for the right bolts, screws, nuts, or washers instead of installing them waste hours that compound across large-scale projects. CSG eliminates job site inefficiency with pre-kitted site delivery, trade-specific packouts, and just-in-time stocking that put the right hardware in the right hands at the right time. Our top C-parts for assembly efficiency include spacer washers for precise alignment, pulley clamps for rigging and mechanical systems, and labeled fastener bags organized by assembly sequence and sub-system. These trade-specific kits are engineered for the most common high-volume construction applications: rooftop unit assembly, HVAC frame installs, and window and curtainwall sets—where missing a single fastener can stall an entire crew. Combined with our vendor-managed inventory (VMI) programs, these solutions reduce downtime, eliminate waste, and accelerate project schedules.
Meeting QA, Traceability & Inspector Documentation Requirements for Construction Hardware
Contractors and OEMs in construction and infrastructure face rigorous quality assurance demands—structural inspectors require lot and batch traceability, material test reports, and compliance documentation for every critical fastener, bolt, and anchor in load-bearing and life-safety applications. Missing paperwork halts inspections, delays occupancy permits, and exposes contractors to significant liability. CSG provides fully traceable, inspector-ready C-parts backed by lot and batch tracking, barcode/QR packaging for instant field verification, and standardized QA forms including mill certifications and material test reports. Our top C-parts for traceability-critical applications include barcoded bolts with scannable lot identification, traceable fasteners with full material certification chains, and tagged kits pre-labeled with specification and grade data. These solutions are purpose-built for public projects requiring inspector-submitted documentation, and high-risk load areas where every fastener must be verified, documented, and audit-ready before the structure can be certified for occupancy.
Explore Our Product Categories
Hex Head Structural Bolts (A325 / A490)
High-Strength Heavy Hex Bolts for Structural Steel Connections
Heavy hex structural bolts manufactured to ASTM A325 and A490 standards for load-bearing steel connections in bridges, commercial buildings, and critical infrastructure. Engineered for consistent preload, superior shear resistance, and fatigue performance in the most demanding structural joints.
CSG supplies structural bolts with matching heavy hex nuts and hardened flat washers in full assemblies—supporting steel fabricators, bridge contractors, and commercial building projects with complete material certifications, mill test reports, and lot traceability for code-compliant structural steel erection.
Expansion Anchors (Wedge, Sleeve & Drop-In Types)
Mechanical Concrete Anchors for High-Load Structural Applications
Wedge anchors, sleeve anchors, and drop-in anchors providing reliable shear and tensile load transfer in cracked and uncracked concrete. Mechanical expansion design ensures consistent performance for steel base plates, handrails, machinery mounts, seismic bracing, and overhead MEP supports.
CSG stocks zinc-plated, hot-dip galvanized, and stainless steel expansion anchors from 1/4″ through 1-1/4″—supporting infrastructure, industrial, and commercial construction projects with ICC-ES evaluated and code-approved anchor solutions for every seismic design category.
Chemical Anchors (Epoxy & Polyester Resin Systems)
Bonded Anchoring Systems for Superior Load Performance in Concrete & Masonry
Injectable epoxy and polyester resin anchoring systems for securing threaded rods, rebar, and studs into concrete, brick, and CMU block. Chemical anchors deliver superior load capacity in seismic zones, close-to-edge conditions, and applications where mechanical expansion anchors cannot be used.
CSG supplies cartridge-based and bulk chemical anchor systems for post-installed rebar connections, overhead structural retrofits, and critical foundation anchoring—complete with mixing nozzles, installation accessories, and project-specific technical support.
Threaded Rods (All-Thread Studs)
Fully Threaded Rods for Suspended Systems, Hangers & Structural Anchoring
Fully threaded rods in zinc-plated, hot-dip galvanized, stainless steel, and plain carbon steel for HVAC suspension, conduit hangers, piping supports, baseplate anchoring, and concrete formwork tie-downs. Available in UNC, UNF, metric, and Acme thread patterns for every construction application.
CSG stocks threaded rod from 1/4″ through 2″ diameter in standard and custom-cut lengths—supporting mechanical contractors, electrical installations, and infrastructure projects with material certifications per ASTM F1554 and ASTM A36 specifications.
Construction Screws (Lag, Deck, Structural & Self-Drilling)
Heavy-Duty Screws for Wood, Steel & Composite Connections
Engineered construction screws for wood-to-wood, wood-to-concrete, wood-to-steel, and steel-to-steel connections in framing, decking, roofing, and structural assemblies. Includes lag screws, timber screws, structural deck screws, and self-drilling Tek screws with corrosion-resistant coatings and high withdrawal strength.
CSG supplies construction screws with hex heads, star drives, and engineered thread designs—supporting residential framing, commercial metal building construction, heavy timber connections, and exterior deck installations with code-compliant fastening solutions.
Structural Nuts, Washers & Lock Hardware
Heavy Hex Nuts, Hardened Washers & Anti-Vibration Locking Systems
Heavy hex structural nuts (ASTM A563), hardened flat washers (ASTM F436), beveled washers, and anti-vibration lock washers for structural bolted connections. Load-distributing washers ensure even clamping force; lock washers and prevailing torque nuts prevent fastener back-off under dynamic and seismic loading.
CSG supplies structural nuts and washers in plain, galvanized, and stainless finishes in full bolt assemblies—supporting steel erection, bridge construction, and seismic retrofit projects with dimensional accuracy per ASTM standards and complete traceability documentation.
Concrete Nails & Masonry Fasteners
Hardened Steel Nails for Direct Concrete, Brick & CMU Fastening
Hardened steel nails and masonry screws designed to drive directly into concrete, brick, CMU block, and stone substrates without pre-drilling. Used in drywall track installation, furring strips, temporary formwork, conduit strapping, and light-duty anchoring across commercial and residential construction.
CSG stocks smooth shank and fluted concrete nails in bright, galvanized, and vinyl-coated finishes along with concrete screws in hex and Phillips head styles—providing reliable holding power for masonry work, interior finishing, and general construction applications
Blind Rivets & Lockbolts for Steel Construction
Permanent Fastening Systems for Metal Buildings, Cladding & HVAC Ductwork
Heavy-duty blind rivets and two-piece lockbolt assemblies for steel framing, architectural curtain wall systems, metal roof and wall panel installations, and HVAC ductwork connections. Blind rivets enable fast one-sided installation in hollow sections; lockbolts provide vibration-proof, high-shear permanent joints.
CSG stocks aluminum, steel, and stainless steel blind rivets plus lockbolt systems—supporting metal building contractors, HVAC mechanical installations, and architectural cladding projects with permanent, code-compliant connections and engineering support.
Construction & Infrastructure Products at a Glance
| Product category | What it is used for |
|---|---|
| Hex Head Structural Bolts (A325 / A490) | High-Strength Heavy Hex Bolts for Structural Steel Connections. |
| Expansion Anchors (Wedge, Sleeve & Drop-In Types) | Mechanical Concrete Anchors for High-Load Structural Applications. |
| Chemical Anchors (Epoxy & Polyester Resin Systems) | Bonded Anchoring Systems for Superior Load Performance in Concrete & Masonry Injectable epoxy and polyester resin anchoring systems for securing threaded rods, rebar, and studs into concrete, brick, and CMU block. |
| Threaded Rods (All-Thread Studs) | Fully Threaded Rods for Suspended Systems, Hangers & Structural Anchoring. |
| Construction Screws (Lag, Deck, Structural & Self-Drilling) | Heavy-Duty Screws for Wood, Steel & Composite Connections. |
| Structural Nuts, Washers & Lock Hardware | Heavy Hex Nuts, Hardened Washers & Anti-Vibration Locking Systems. |
| Concrete Nails & Masonry Fasteners | Hardened Steel Nails for Direct Concrete, Brick & CMU Fastening. |
| Blind Rivets & Lockbolts for Steel Construction | Permanent Fastening Systems for Metal Buildings, Cladding & HVAC Ductwork. |
Why Component Solutions Group?
At Component Solutions Group, your success is our success. We take pride in delivering the best solutions to meet your unique needs, offering products, expertise, and innovation to tackle any challenge.
With a diverse range of high-quality products and problem-solving capabilities, we’re equipped to address even the most complex requirements. From standard components to custom-engineered solutions, we are committed to helping you achieve your goals with precision and reliability.
Complete Solution For Every Application
Our extensive inventory of standard fasteners, structural bolts, screws, nuts, anchors, and washers—combined with our expertise in custom-engineered C-parts—allows us to provide tailored solutions that improve product performance, reduce waste, and drive long-term value for construction and infrastructure OEMs.
Custom Engineering
Tailored C-parts and fastener solutions designed to optimize your specific construction application and improve product performance
Design Optimization
Performance testing
Cost reduction
Quality Assistance
Global Sourcing
Leveraging our global network and the strength of our parent company, Bufab, to source any component while ensuring strict adherence to construction industry standards.
MS/NAS/AN Compliance
Extensive Global Network
Backed by Bufab
Rigorous Quality Control
Sustainability Focus
Environmentally responsible solutions that help you meet sustainability goals without compromising performance
Eco-friendly materials
Waste Reduction
Carbon Footprint Analysis
Circular economy
Cost Optimization
Strategic approaches to reduce total cost of ownership through smart sourcing and process improvement
TCO Analysis
Value engineering
Process optimization
ROI tracking
Top Construction & Infrastructure Solutions from CSG: Engineered for Structural Endurance
CSG’s comprehensive range of fasteners, bolts, screws, nuts, anchors, and C-parts for construction and infrastructure are meticulously selected and engineered to ensure the highest standards of structural safety, code compliance, durability, and efficiency for every phase of your project—from foundation anchoring to final inspection.
Corrosion-Resistant Fasteners & Legacy Retrofit Hardware
Our corrosion-resistant finishes, weather-sealed kits, and protective coatings deliver long-term durability for fasteners exposed to moisture, UV, and thermal cycling on construction sites. For the most aggressive environments—coastal bridges, water treatment plants, chemical facilities—we supply BUMAX high-alloy stainless steel fasteners that outperform standard galvanized hardware by orders of magnitude. Our top C-parts for these applications include anchor bolts with advanced plating systems, exterior-grade screws with ceramic and zinc-flake coatings, and structural washers engineered from marine-grade alloys—serving prefab wall systems, steel framing, and exterior panel installation where standard carbon steel fails prematurely. For aging infrastructure, our cross-matching support and legacy spec revalidation ensure that façade retrofit, elevator modernization, and heritage building repair projects receive the multi-fit brackets, dual-thread anchors, and universal washer kits they need without costly redesign or custom manufacturing delays.
Seismic-Rated & High-Load Structural Fastening Systems
Code-Compliant Hardware Kits & Job Site Assembly Efficiency
Traceable, Inspector-Ready C-Parts with Full QA Documentation
Every structural bolt, nut, anchor, washer, and fastener from CSG ships with complete lot and batch tracking, barcode/QR packaging for instant field verification, and standardized QA forms including mill certifications and material test reports. Our top C-parts for traceability-critical applications include barcoded bolts with scannable lot identification, traceable fasteners with full material certification chains, and tagged kits pre-labeled with specification and grade data. These solutions are purpose-built for public projects requiring inspector-submitted documentation and high-risk load areas where every fastener must be verified, documented, and audit-ready before the structure can be certified for occupancy. This commitment to documentation excellence ensures smooth inspections, faster occupancy permits, and reduced contractor liability across commercial, industrial, and public infrastructure construction.
Vibration Control & Dynamic Load Resilience
Our Trusted Partners
Customer Success Stories & Case Studies
Construction & infrastructure partnerships, demonstrating measurable impact on mission-critical programs.
engcon – Construction Equipment Manufacturer quipment Manufacturer
The Challenge:A construction equipment manufacturer required durable, high-strength components to support heavy-duty machinery performance while maintaining reliable production schedules and minimizing field failures.
Extreme operating conditions with heavy loads and vibration
Corrosion exposure from mud, moisture, and outdoor environments
Downtime risks from component wear or failure
Supply chain pressure for consistent production output
The Solution: A strategic supply partnership delivered engineered fastening and component solutions designed for construction equipment applications, with reliable sourcing and consistent quality.
Implementation Outcomes
Successful adoption for original application
Expanded to multiple engineering teams
Eliminated primary failure mode completely
Simplified supply chain management
Competitive Advantages
Mission Assurance
Enhanced reliability
Logistics
Simplified supply chain
Design Flexibility
Weight optimization
Sustainability
Increased longevity
The Results
100%
Failure Elimination
1220
MPa Tensile Strength
Performance Characteristics
Tensile Strength
Built for heavy-load construction applications
Corrosion Resistance
Reliable protection in harsh outdoor environments
Precision Fit
Consistent quality for efficient assembly
Ductility
Excellent
H₂ Embrittlement
Immune
Weight Ratio
High strength-to-weight
Available Configurations
Standard Stock:
ISO 4762, ISO 4017
Size Range:
7/32" to 3/8" (M6-M20)
Custom Options:
Various fastener types
Grade Equivalent:
12.9 Carbon Steel
From Skyscrapers to Bridges: Fasteners, Bolts & Anchors That Perform
Whether securing the structural steel framework of a high-rise, anchoring foundation bolts for critical infrastructure, or fastening roofing panels against extreme weather, our construction-grade bolts, screws, nuts, anchors, and C-parts are engineered to meet the highest standards of strength, safety, and code compliance.
Products for Construction & Infrastructure
Browse the CSG product categories most referenced on this page:
For construction programmes with high-value or irregular usage, consignment inventory keeps stock on your site and you pay as parts are used.
Your Construction & Infrastructure Fastener Questions, Answered
Selecting the right structural bolts, screws, nuts, anchors, and C-parts is critical to ensuring project performance, building code compliance, and long-term structural durability. We have addressed the most common questions about construction fasteners and hardware, backed by CSG’s engineering expertise and reliable solutions.
What types of fasteners, bolts, and anchors are used in commercial construction and infrastructure projects?
Commercial construction and infrastructure projects use a wide range of fasteners including ASTM A325 and A490 heavy hex structural bolts for steel-to-steel connections, wedge and sleeve expansion anchors for concrete base plates and handrails, chemical epoxy anchors for rebar and seismic retrofits, self-drilling screws for metal framing, lag screws and timber screws for wood connections, threaded rods for HVAC and MEP suspension, heavy hex nuts and hardened washers for structural joints, and blind rivets and lockbolts for metal panel and cladding installations. The specific type depends on the substrate material, load requirements, environmental exposure, and applicable building code. CSG supplies all of these fastener categories with full material certifications and engineering support.
What is the difference between ASTM A325 and A490 structural bolts, and when should each be used?
ASTM A325 and A490 are both high-strength structural bolt specifications used in steel construction, but they differ in strength class and application. A325 bolts are medium-carbon steel with a minimum tensile strength of 120 ksi and are the standard choice for most structural steel connections in buildings and bridges. A490 bolts are alloy steel with a minimum tensile strength of 150 ksi, specified for connections requiring higher clamping force or where fewer bolts are needed to carry heavy loads. A490 bolts cannot be hot-dip galvanized due to hydrogen embrittlement risk and are typically used in bare or mechanically galvanized finishes. CSG supplies both grades with matching heavy hex nuts and hardened washers in complete structural bolt assemblies.
How do corrosion-resistant fasteners and galvanized bolts protect infrastructure from premature failure?
Corrosion-resistant fasteners protect infrastructure by preventing the oxidation and material degradation that weaken standard carbon steel hardware over time. Hot-dip galvanized bolts, nuts, and washers provide a thick sacrificial zinc coating that shields the base steel from moisture, salt spray, and atmospheric chemicals—extending service life by decades in outdoor bridge, highway, and utility applications. For the most aggressive environments such as coastal infrastructure, chemical plants, and wastewater facilities, BUMAX high-alloy stainless steel fasteners offer exceptional resistance to chlorides, pitting, and crevice corrosion that even galvanized finishes cannot match. Selecting the correct corrosion protection strategy—whether galvanizing, stainless steel, or specialty coatings—based on the specific environmental exposure is essential to preventing premature fastener failure and costly structural repairs.
What are C-parts in construction, and why do OEM manufacturers need a dedicated C-parts supplier?
C-parts in construction are the high-volume, low-unit-cost components that are essential to every assembly but often overlooked in procurement strategy—including bolts, screws, nuts, washers, anchors, rivets, clips, seals, and gaskets. Despite their low individual cost, C-parts represent up to 80% of indirect procurement costs through sourcing complexity, supplier fragmentation, inventory management overhead, and production line downtime when parts are missing. OEMs manufacturing prefab wall panels, modular buildings, steel framing systems, or HVAC units benefit from a dedicated C-parts supplier like CSG because we consolidate hundreds of SKUs into a single source with vendor-managed inventory (VMI), pre-kitted delivery, and engineering support—dramatically reducing total cost of ownership while ensuring every fastener meets specification.
What fasteners and anchors are required for construction in seismic zones?
Construction in seismic zones requires fasteners and anchors specifically tested and approved for dynamic loading, cyclic tension, and cracking concrete conditions. This includes seismic-rated wedge anchors and undercut anchors tested per ACI 355.2 and approved through ICC-ES evaluation reports, chemical anchoring systems approved for cracked concrete in high seismic design categories (SDC C through F), structural bolts with lock washers or prevailing torque nuts to prevent loosening under vibration, and seismic bracing brackets and clips certified for non-structural component restraint per ASCE 7. Standard expansion anchors not tested for seismic conditions may fail under earthquake loading and will not pass inspection. CSG supplies a full range of ICC-ES approved seismic anchors, seismic bracing hardware, and vibration-resistant structural fasteners with the documentation required for code-compliant installations.
How does vendor-managed inventory (VMI) for construction fasteners reduce project costs and delays?
Vendor-managed inventory (VMI) for construction fasteners reduces project costs and delays by shifting inventory planning, replenishment, and logistics from the contractor or OEM to the fastener supplier. Instead of managing hundreds of individual bolt, screw, nut, and anchor SKUs across multiple vendors with varying lead times, CSG monitors your consumption patterns, forecasts demand, and ensures just-in-time delivery of the right C-parts to your production line or job site. This eliminates emergency purchases at premium pricing, prevents production stoppages from stockouts, reduces warehouse space and carrying costs, and frees your procurement team to focus on higher-value activities. For construction OEMs running high-volume production of modular buildings, steel framing systems, or prefab panels, VMI can reduce total C-parts procurement costs by 15–25% while improving on-time delivery rates.
From Costly Components To Lowest TCO. That's CSG.
Enhance Operational Efficiency with Optimized Component Management
Greater Value
From procurement to
performance