NAS1291-8 – NUT, WASHER, SELF-LOCKING

Description

NAS1291-8 – NUT, WASHER, SELF-LOCKING

Specifications

Treatment (Surface): Cadmium
Material: Steel
Nominal Size (Thread): 0.500″
Thread Class: 3B
Thread Direction: Right-Hand
Thread Type: Unjf
Threads Per inch: 20
Flat Width (Across): 0.556″ – 0.566″
Outer Diameter (Washer): 0.814″
Overall Height: 0.350″ – 0.410″
Temperature Rating: 450.0°F Nominal
Washer Thickness: 0.040″

Part Number: NAS1291-8
Unpunctuated: NAS12918

The specifications above are for reference only. Verify tolerances and details in the official spec sheets before use.

AVBOX US Certificate of Conformance: This product comes with an AVBOX US Certificate of Conformance (CoC), assuring that the part(s) meet specified design, quality, and regulatory standards at the time of manufacture, providing confirmation of compliance and adherence to applicable aviation requirements.

Part Numbers, Alternates & Reference Info: We ship the exact part number shown in the product title/description when in stock. Any NSNs or alternate part numbers listed are for traceability/reference only. If a compatible alternate is the only option available, we will contact you before shipping to confirm acceptance. Specifications are compiled from multiple sources and provided for convenience; always verify fit, tolerances, and requirements in the official spec sheets and applicable repair manuals/IPCs before purchase. If specific documentation (e.g., 8130 or company CoC/trace) is required, please contact us before ordering. We do not provide usage/support guidance, please refer to the manuals. Ordering the wrong part can extend lead times and result in aircraft downtime.