SCREW, MACHINE, MUSHROOM HEAD (P/N a113-4b) - New Surplus
P/N: a113-4b
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 | 16 Available |
Product Description
The a113-4b is a steel machine screw with a mushroom (truss) head designed to distribute load over thin sheet materials in aircraft assemblies. Conforming to AN526 standard specifications, this fastener secures removable access panels and similar components where load spreading is critical. The truss-style head provides a larger bearing surface than standard machine screws, preventing pull-through on thin aluminum or composite sheets.
Installation requires matching thread size and length to aircraft maintenance manual specifications and applying torque per OEM guidance. Commonly used in general and commercial aviation for panel attachment and structural fastening.
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 SCREW, MACHINE, MUSHROOM HEAD (P/N a113-4b)?
The a113-4b is a steel machine screw with a mushroom (truss) head designed to distribute load over thin sheet materials in aircraft assemblies. Conforming to AN526 standard specifications, this fastener secures removable access panels and similar components where load spreading is critical.
Does the a113-4b meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The SCREW, MACHINE, MUSHROOM HEAD 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 a113-4b 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 a113-4b.
Can I order the a113-4b in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The SCREW, MACHINE, MUSHROOM HEAD is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.