WASHER, CSK TYPE FINISHING (P/N nas391-b6p) - New Surplus

The NAS391-B6P is a countersunk finishing washer designed for #6 screws and fasteners. This washer provides a shaped seat that accommodates flat or oval screw heads, distributing load across thin substrates in aircraft structures. Manufactured in steel or copper alloy per NAS391 specifications, it improves bearing area and prevents fastener head pull-through on interior panels and trim components.

Install the washer directly under the screw head, ensuring proper seating before tightening. Verify part compatibility against your aircraft's Illustrated Parts Catalog for specific applications.

What is the WASHER, CSK TYPE FINISHING (P/N nas391-b6p)?

The NAS391-B6P is a countersunk finishing washer designed for #6 screws and fasteners. This washer provides a shaped seat that accommodates flat or oval screw heads, distributing load across thin substrates in aircraft structures.

Does the nas391-b6p meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The WASHER, CSK TYPE FINISHING 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 nas391-b6p 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 nas391-b6p.

Can I order the nas391-b6p in custom quantities?

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