BOLT,CLOSE TOLERANCE (P/N an176-21) - New Surplus

The AN176-21 is a close tolerance hex head bolt with 3/8-24 UNF-3A thread specifications, manufactured from alloy steel per AN standards. This bolt secures shear-critical structural lug joints in aircraft frameworks where minimal clearance is required. The close tolerance design fits precision-reamed holes without play, maintaining structural integrity in high-stress applications.

Installation involves placing the bolt in reamed holes and torquing per aircraft maintenance manual specifications. Commonly used in general aviation and commercial aircraft structural repairs and assembly during MRO operations.

What is the BOLT,CLOSE TOLERANCE (P/N an176-21)?

The AN176-21 is a close tolerance hex head bolt with 3/8-24 UNF-3A thread specifications, manufactured from alloy steel per AN standards. This bolt secures shear-critical structural lug joints in aircraft frameworks where minimal clearance is required.

Does the an176-21 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 an176-21 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 an176-21.

Can I order the an176-21 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.