BOLT,MACHINE (P/N an4-21a) - New Surplus
P/N: an4-21a
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 | 155 Available |
Product Description
The AN4-21A is a 1/4-inch hex-head machine bolt conforming to Army-Navy standards for aerospace fastening. Manufactured from steel with an undrilled shank, this bolt provides secure attachment in control bracket assemblies and structural airframe connections. Install with approved AN-standard nut and washer, torquing per aircraft maintenance manual specifications.
The AN4 series designation ensures compatibility with standard aerospace hardware and maintenance procedures across general and commercial aviation applications.
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 an4-21a)?
The AN4-21A is a 1/4-inch hex-head machine bolt conforming to Army-Navy standards for aerospace fastening. Manufactured from steel with an undrilled shank, this bolt provides secure attachment in control bracket assemblies and structural airframe connections.
Does the an4-21a 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 an4-21a 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 an4-21a.
Can I order the an4-21a 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.
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