NIPPLE (P/N a1381) - New Surplus

The a1381 is a flat washer designed to distribute clamp load and protect bearing surfaces in bolted joints. Commonly used in airframe and propeller hardware stacks, it sits beneath bolt heads or nuts to prevent fastener pull-through and surface damage. Manufactured to aerospace standards including AN960 and NAS1149 specifications.

Installation follows aircraft maintenance manual procedures; verify part fit through your aircraft's Illustrated Parts Catalog before replacement. Standard hardware component for general aviation and commercial aircraft assembly and maintenance.

What is the NIPPLE (P/N a1381)?

The a1381 is a flat washer designed to distribute clamp load and protect bearing surfaces in bolted joints. Commonly used in airframe and propeller hardware stacks, it sits beneath bolt heads or nuts to prevent fastener pull-through and surface damage.

Does the a1381 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NIPPLE 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 a1381 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 a1381.

Can I order the a1381 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The NIPPLE is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.