BOLT,CLOSE TOLERANCE (P/N an173-21) - New Surplus
P/N: an173-21
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 | 11 Available |
Product Description
The AN173-21 is a close tolerance hex-head aircraft bolt with 10-32 UNF-3A threads and alloy-steel construction. Designed for interference-fit structural joints in reamed airframe holes, this AN-standard fastener provides tight shear fit at critical attachment points. Commonly used in bracket assemblies and primary structure connections requiring precision fit.
Installation in close tolerance holes may require light tapping to seat properly. Follow aircraft maintenance manual torque specifications and FAA AC 43.13-1B guidance for installation procedures.
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 an173-21)?
The AN173-21 is a close tolerance hex-head aircraft bolt with 10-32 UNF-3A threads and alloy-steel construction. Designed for interference-fit structural joints in reamed airframe holes, this AN-standard fastener provides tight shear fit at critical attachment points.
Does the an173-21 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 an173-21 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 an173-21.
Can I order the an173-21 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.