WASHER (P/N 78-121) - New Surplus
P/N: 78-121
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 | 6 Available |
Product Description
The 78-121 is a flat washer for aircraft fastener assemblies, providing a smooth bearing surface under bolt heads and nuts. This washer distributes clamp load across a wider area to protect underlying substrates from fastener indentation and stress concentration. Manufactured to aerospace standards, it's installed under bolts in airframe structural joints, control surface attachments, and component mounting points.
Follow the aircraft maintenance manual and FAA AC 43.13-1B guidance for proper installation and torque 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 WASHER (P/N 78-121)?
The 78-121 is a flat washer for aircraft fastener assemblies, providing a smooth bearing surface under bolt heads and nuts. This washer distributes clamp load across a wider area to protect underlying substrates from fastener indentation and stress concentration.
Does the 78-121 meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The WASHER 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 78-121 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 78-121.
Can I order the 78-121 in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The WASHER is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.
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