BOLT,CLOSE TOLERANCE (P/N an175-20a) - New Surplus

The AN175-20A is a close-tolerance hex-head aircraft bolt with 5/16-24 UNF threads and an undrilled shank. This AN175 series fastener provides precision fits in structural joints where the shank carries shear loads. Used in reamed holes to maintain tight tolerances and prevent movement under vibration and flight stress.

Install and torque per aircraft maintenance manual specifications. Verify compatibility with your aircraft's Illustrated Parts Catalog before installation.

What is the BOLT,CLOSE TOLERANCE (P/N an175-20a)?

The AN175-20A is a close-tolerance hex-head aircraft bolt with 5/16-24 UNF threads and an undrilled shank. This AN175 series fastener provides precision fits in structural joints where the shank carries shear loads.

Does the an175-20a meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The BOLT,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 an175-20a 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 an175-20a.

Can I order the an175-20a in custom quantities?

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