WASHER (P/N 603-4) - New Surplus

The 603-4 is a plain flat washer for aircraft fastening assemblies. It provides a smooth bearing surface under bolt or nut heads, distributing clamp load across a wider area to prevent surface damage and material deformation. Commonly specified under AN960 or NAS1149 standards for general aviation and commercial aircraft applications.

Install with the washer positioned between the fastener head and the surface being clamped, then apply torque per aircraft maintenance manual specifications. Suitable for equipment mounting points, structural connections, and access panel installations where load distribution is required.

What is the WASHER (P/N 603-4)?

The 603-4 is a plain flat washer for aircraft fastening assemblies. It provides a smooth bearing surface under bolt or nut heads, distributing clamp load across a wider area to prevent surface damage and material deformation.

What conditions is the 603-4 available in?

The 603-4 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 603-4?

The 603-4 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 603-4?

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.