BOLT,CLOSE TOLERANCE (P/N an175-21a) - New Surplus
P/N: an175-21a
Category: Fasteners & Hardware
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| New Surplus | 96 Available |
Product Description
The AN175-21A is a close-tolerance hex-head bolt conforming to Army-Navy aeronautical standards. This alloy-steel fastener features a 5/16-24 UNF thread for precision shear joints requiring exact alignment in aircraft structures. Used in airframe applications where tight tolerances ensure proper load distribution and component fit.
Installation requires torque verification per the aircraft maintenance manual and grip length confirmation against the Illustrated Parts Catalog.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the BOLT,CLOSE TOLERANCE (P/N an175-21a)?
The AN175-21A is a close-tolerance hex-head bolt conforming to Army-Navy aeronautical standards. This alloy-steel fastener features a 5/16-24 UNF thread for precision shear joints requiring exact alignment in aircraft structures.
Does the an175-21a 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 an175-21a 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 an175-21a.
Can I order the an175-21a 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.