A286 Fasteners Catalog: Hex Bolts, Socket Caps, Studs, Nuts, Washers & 12‑Point Aerospace Bolts

When your design requires high‑temperature strength and corrosion resistance without the cost of nickel‑base superalloys, A286 alloy fasteners are the proven solution. At RAYCHIN LIMITED, we manufacture the complete spectrum of A286 fastener types—from standard A286 hex bolts and A286 socket head cap screws to specialty A286 12‑point bolts for aerospace. Our factory‑direct control, extensive metric and imperial inventory, and full certification make us the global supplier of choice for demanding applications in automotive, aerospace, and industrial gas turbines.

1. A286 Hex Bolts

Our A286 hex bolts are manufactured to ASME B18.2.1 (imperial) and DIN 931/933 / ISO 4014 (metric), available in partial thread and full thread configurations. Typical sizes range from 1/4″ to 2″ (imperial) and M6 to M48 (metric), with larger diameters up to M64 or 2‑1/2″ upon request. These bolts are widely used in exhaust manifold flanges, turbocharger housings, and high‑temperature flanged connections. We offer Class D (130 ksi min tensile) as standard, with Class B and C available for lower stress applications.

2. A286 Socket Head Cap Screws

For confined spaces and high‑strength clamping, A286 socket head cap screws per ASME B18.3 provide a compact, high‑torque solution. RAYCHIN manufactures these in diameters from #4 to 1″ (imperial) and M3 to M24 (metric). The internal hex drive allows precise torque application, making them ideal for turbocharger actuator mounts, EGR valve attachments, and instrumentation brackets in hot zones. We can supply these with MoS₂ or silver anti‑seize coatings pre‑applied for galling‑free assembly.

3. A286 Stud Bolts and Threaded Rod

Our A286 stud bolts cover the full range of configurations:

• Double‑end studs (tap‑end and nut‑end) per ASME B16.5 or customer specification, with unequal or equal thread lengths.
• Fully threaded studs / continuous threaded rod per ASME B18.31.2 or DIN 976, available in lengths up to 3 meters.
• Custom stepped studs with reduced‑shank diameters for thermal expansion accommodation.

Diameter range: 1/4″ – 2‑1/2″ (imperial), M6 – M64 (metric). These are the workhorses of exhaust manifold‑to‑cylinder‑head connections, turbine flange joints, and high‑temperature piping systems.

4. A286 Heavy Hex Nuts

Matching our studs and bolts, we produce A286 heavy hex nuts per ASME B18.2.2 and DIN 934, with proof‑load capacities verified to match the tensile strength of our Class D fasteners. For high‑temperature locking requirements, we also supply all‑metal prevailing‑torque lock nuts in A286. These nuts are designed to maintain preload under vibration and thermal cycling without the use of polymer inserts that degrade above 250°C.

5. A286 Washers Dimensions

We manufacture A286 washers to ASME B18.22.1 (flat washers) and DIN 125, in standard and custom dimensions. Common sizes match bolt diameters from 1/4″ to 2″ and M6 to M48. Spring lock washers per DIN 127 are also available for anti‑loosening applications. Washers play a critical role in distributing clamp load and protecting flange surfaces; our A286 washers retain their mechanical properties and corrosion resistance at elevated temperature, ensuring long‑term joint integrity.

6. A286 12‑Point Bolts Aerospace

For gas turbine engines and aerospace assemblies where a compact wrenching envelope and high torque transfer are essential, RAYCHIN produces A286 12‑point bolts aerospace to ASME B18.2.5 and customer‑specific head profiles. These bolts are manufactured from AMS 5737 bar, aged in NADCAP‑accredited vacuum furnaces, and subjected to 100% fluorescent penetrant inspection (FPI). Typical applications include compressor case flanges, combustor external brackets, and accessory gearbox mounts. We deliver these with full AS9102 FAIR documentation and EN 10204 Type 3.2 certification.

7. A286 Bolts Metric vs Imperial

A common procurement question: can I get A286 bolts in both metric and imperial? The answer is yes. RAYCHIN maintains stock and tooling for both measurement systems, and we routinely ship mixed‑order requirements. The table below shows typical size ranges available.

We can cross‑reference imperial and metric requirements seamlessly—simply specify the thread standard and dimensions on your RFQ.

8. A286 Flanged Bolt Dimensions

For applications requiring a larger bearing surface without a separate washer, A286 flanged bolts integrate a washer‑like flange under the head. RAYCHIN can manufacture these to your specific dimensional requirements, including head diameter, flange thickness, and under‑head fillet radius. These are commonly used in exhaust and turbocharger connections where vibration distribution is critical. Send your drawing with flanged bolt dimensions, and our engineering team will provide a fast quotation.

9. Quality, Certification, and Custom Manufacturing

Every A286 fastener we ship is backed by our rigorous quality system:

• Material certification: EN 10204 Type 3.1 as standard, Type 3.2 with third‑party witness on request.
• In‑house testing: PMI (OES), lot tensile and hardness testing, microstructural verification.
• Custom coatings: MoS₂, boron nitride, silver anti‑seize, applied in‑house.
• Non‑standard parts: Shoulder bolts, flanged hex bolts, reduced‑shank studs, and other specials manufactured from your CAD model.