WASHER (P/N 66-12990-2) - New Surplus

The 66-12990-2 is a flat washer that distributes clamp load and protects mating surfaces in bolted aircraft joints. Manufactured from steel, stainless steel, or aluminum per AN960/NAS1149 standards, this washer sits beneath bolt heads or nuts in panel and bracket assemblies. It prevents fasteners from pulling through softer materials and reduces stress concentration at connection points.

Select size and thickness according to your aircraft's Illustrated Parts Catalog, then torque per FAA AC 43.13-1B guidance. Replace washers if castellations won't align after torquing.

What is the WASHER (P/N 66-12990-2)?

The 66-12990-2 is a flat washer that distributes clamp load and protects mating surfaces in bolted aircraft joints. Manufactured from steel, stainless steel, or aluminum per AN960/NAS1149 standards, this washer sits beneath bolt heads or nuts in panel and bracket assemblies.

What conditions is the 66-12990-2 available in?

The 66-12990-2 is currently available in the following conditions: New Surplus. Each condition reflects the part's maintenance history and certification status per FAA standards.

How do I get pricing for the 66-12990-2?

The 66-12990-2 requires a custom quote. Submit a Request for Quote (RFQ) through our website or call our sales team at (904) 998-9101 for immediate pricing assistance.

Do you offer expedited shipping for the 66-12990-2?

Yes, we offer same-day processing on in-stock items and provide 24/7 AOG (Aircraft on Ground) support for urgent needs. Standard, expedited, and overnight shipping options are available.