BOLT, MACHINE, CLOSE TOLERANCE (P/N an174-6) - New Surplus

The AN174-6 is a close-tolerance hex-head machine bolt with 1/4-28 UNF threads and a drilled shank for safetying. This aircraft-grade fastener installs in reamed, interference-fit shear joints common in control-system brackets and structural assemblies. The drilled shank accommodates safety wire, preventing accidental loosening during flight operations.

Install in correctly sized holes with appropriate washers and nuts, then torque per aircraft maintenance manual specifications. Designed for tight-fit applications where precision hole alignment and load transfer are critical.

What is the BOLT, MACHINE, CLOSE TOLERANCE (P/N an174-6)?

The AN174-6 is a close-tolerance hex-head machine bolt with 1/4-28 UNF threads and a drilled shank for safetying. This aircraft-grade fastener installs in reamed, interference-fit shear joints common in control-system brackets and structural assemblies.

Does the an174-6 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The BOLT, MACHINE, CLOSE TOLERANCE conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the an174-6 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the an174-6.

Can I order the an174-6 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The BOLT, MACHINE, CLOSE TOLERANCE is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.