BOLT,MACHINE (P/N an4-3a) - New Surplus
P/N: an4-3a
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 | 286 Available |
Product Description
The AN4-3A is a 1/4-inch steel hex-head machine bolt conforming to Army-Navy fastener standards. It features 1/4-28 UNF-3A threads with an undrilled shank, making it suitable for structural airframe joints where through-bolts aren't required. This fastener pairs with washers and nuts to create secure connections in aircraft primary and secondary structure.
Installation requires torquing per aircraft maintenance manual specifications; when manufacturer data are unavailable, follow FAA AC 43.13-1B guidance for acceptable practices.
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,MACHINE (P/N an4-3a)?
The AN4-3A is a 1/4-inch steel hex-head machine bolt conforming to Army-Navy fastener standards. It features 1/4-28 UNF-3A threads with an undrilled shank, making it suitable for structural airframe joints where through-bolts aren't required.
Does the an4-3a meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The BOLT,MACHINE 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 an4-3a 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 an4-3a.
Can I order the an4-3a in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The BOLT,MACHINE is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.