Precision Fastening for Flight-Critical Applications.

CSG maintains AS9120B certification for aerospace quality management and is ITAR registered for controlled defense and aerospace programs. These certifications ensure that fasteners and C-parts are sourced, handled and documented to the standards required by aerospace OEMs and their supply chains.

Yes. CSG sources fasteners to mil-spec (MS, AN, NAS) and other aerospace standards through its qualified supplier network. This includes bolts, screws, nuts, rivets, inserts and specialty hardware traceable to the applicable specification.

Yes. CSG provides full lot traceability for aerospace fasteners, including material certifications, test reports and certificates of conformance. Every component can be traced back to the original material heat and manufacturing lot.

CSG supplies aerospace fasteners in a wide range of materials including alloy steel, stainless steel, titanium, Inconel, A-286, Monel, aluminum alloys and other high-temperature and corrosion-resistant alloys. Material selection depends on the application, operating environment and specification requirements.

Yes. CSG is ITAR registered and can handle controlled hardware, documentation and sourcing requirements for defense and aerospace programs subject to International Traffic in Arms Regulations.

Yes. CSG provides kitting, consignment inventory, custom packaging and replenishment programs designed for aerospace production environments. These programs help reduce line-side shortages, simplify receiving and maintain traceability through the point of use.

Helpful information includes part number, specification (MS, NAS, AN, OEM spec), material, finish, quantity, annual usage, traceability and documentation requirements, ITAR status and target delivery timing. If you do not have every detail, CSG can start with the information available and help identify what else is needed.

AN, NAS and MS are three specification systems for aerospace fasteners. AN (Air Force-Navy) is the original military series, still common on general aviation and legacy platforms. NAS (National Aerospace Standard) covers higher-performance structural hardware. MS (Military Standard) unified military hardware across services and superseded many AN parts. CSG sources all three and cross-references between them.

Yes. CSG supplies elastomeric O-rings, PTFE seals, metal gaskets and composite seals for hydraulic, fuel, pneumatic and bleed air systems. Common compounds include Viton, silicone, EPDM, Kalrez and PTFE, matched to the fluid and temperature. Seals ship with material traceability and shelf-life documentation, which matters because elastomers age even while sitting in stock.

CSG sources discontinued NAS, MS and AN fasteners through the Bufab Group’s global supplier network. When an original part is truly unavailable, our engineering team can develop a reverse-engineered replacement to the original specification. Start with the part number, the spec revision and the platform, and include any approved alternates already on file from your engineering team.

CSG sources from approved, vetted suppliers and keeps chain-of-custody documentation from material source to delivery. Applicable hardware ships in serialized, tamper-evident packaging with lot tracking. For ITAR-controlled parts, access controls and NDA protection cover drawings and bills of material. Ask for the certificate of conformance and material certs on receipt, and check that lot numbers match.

Engine mounts and hot sections usually call for A-286 stainless, Inconel 718 or other nickel-based superalloys, which hold strength at temperatures that weaken alloy steel. Titanium Ti-6Al-4V suits weight-critical areas with moderate heat. CSG supplies these materials with full certs and test reports. Confirm the operating temperature, the governing spec and any required finish before quoting.

Aircraft vibration from engines, turbulence and landing can loosen standard hardware, so flight joints need a locking method. Self-locking nuts use deformed threads or nylon inserts to hold clamp load. Castle nuts with cotter pins and safety wire add a locking feature an inspector can see. CSG supplies self-locking nuts, castle nuts, nut plates, anchor nuts and pins.

Yes. Wire thread inserts such as Heli-Coil are a standard way to create strong, reusable threads in aluminum, magnesium and other soft metals. They also repair stripped threads during MRO without scrapping the part. Key-locking inserts such as Keensert are an alternative where higher pull-out strength is needed. CSG supplies both types to mil-spec and OEM standards.

Composite and bonded panels often allow access from one side only, so builders use blind bolts and lockbolts that clamp evenly without crushing the laminate. Common systems include Huck bolts, Eddie bolts, Hi-Lok fasteners and CherryMAX rivets. CSG supplies these systems to NAS and MS specifications. Share the grip range and panel material so the right fastener can be matched.

Yes. CSG provides DFARS compliant sourcing for aerospace bolts, nuts, rivets, rivet nuts and screws used on defense aircraft programs. DFARS limits where specialty metals such as titanium and certain steels may be melted and produced. State the DFARS requirement on your RFQ so origin documentation is gathered before the order ships. Submit an RFQ to start.