NUT LOCK (P/N cf81-311) - New Surplus
P/N: cf81-311
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 | 1 Available |
Product Description
The cf81-311 is a prevailing-torque lock nut designed to maintain fastener security under aircraft vibration. This nut features a nylon or all-metal insert that creates friction against the bolt thread, preventing loosening during flight operations. Constructed from steel or aluminum per AN365 or NASM21044 standards, it secures airframe brackets, structural attachments, and critical assemblies.
Installation requires matching the nut material and temperature rating to the application, then torquing per aircraft maintenance manual specifications and FAA AC 43.13-1B guidance.
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 NUT LOCK (P/N cf81-311)?
The cf81-311 is a prevailing-torque lock nut designed to maintain fastener security under aircraft vibration. This nut features a nylon or all-metal insert that creates friction against the bolt thread, preventing loosening during flight operations.
Does the cf81-311 meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The NUT LOCK 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 cf81-311 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 cf81-311.
Can I order the cf81-311 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The NUT LOCK is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.
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