NAS1291-7 - Extended Self-Locking Washer Nut

New Surplus, Sold Per Each

A self-locking washer nut is a fastening device that combines a nut with a built-in locking mechanism to prevent it from loosening. It is typically used in applications where vibrations or movement could cause a standard nut to come loose, ensuring a secure and stable connection.

NAS1291 SERIES

NAS standards are maintained by the Aerospace Industries Association (AIA) and specify high-performance parts, such as fasteners and fittings, used in both military and commercial aerospace applications.

Specifications

Treatment (Surface): Cadmium And Chromate
Material: Steel
Style (Locking Feature): Prevailing Torque All Metal Design
Style (Nut): Hexagon
Thread (Class): 3B
Thread (Direction): Right-Hand
Thread (Quantity Per inch): 20
Thread Size (Nominal): 0.438"
Type (Thread): Unf
Diameter (Outer Washer) : 0.708"
Height (Overall): 0.313"- 0.328"
Temperature Rating: 450.0°F Nominal
Thickness (Washer): 0.035" Minimum
Width (Flats): 0.494"- 0.504"

Alternate Part Numbers

NSN: 5310-00-918-0482
Unpunctuated: NAS12917
Alcoa Global Fasteners Inc.: H14-7 (CAGE: 15653), H14-7 (CAGE: 75237)
Alenia Aeronautica Spa: NAS1291-7 (CAGE: A0170)
Cancelled Nsn: 5310-00-943-6787 (CAGE: N/A), 5310-00-966-9597 (CAGE: N/A)
Embraer - Empresa Brasileira De: 2110085 (CAGE: 001JK)
Embraer Empresa Brasileira De: 2110085 (CAGE: S4956)
National Aerospace Standards: NAS1291-7 (CAGE: 80205)
Satair A/S: H14-7 (CAGE: R1120)
Satair Hardware S.A.S.: H14-7 (CAGE: F7652)
Tecnotec Sarl: H14-7 (CAGE: F6033)
Note: Some part numbers may serve as functional alternatives to the original, offering similar specifications and performance; however, prior verification is recommended to ensure suitability for the intended application.

Potential End Applications

AIRCRAFTS: STRATOLIFTER C/KC-135, HERCULES C-130, GALAXY C-5, T-37, T-38, B-1B, SOF (AC-130H, MC-130H, EC-130E, HC-130, MC-130W), T-2, OSPREY CV-22B

HELICOPTERS: IROQUOIS HH/UH-1, ATTACK - NSN: 1520-01-106-9519, SEA KNIGHT H-46, CH-53 D/E, APACHE AH-64, H1 ALL VERSIONS, MH-53E

This list is provided for informational purposes only and includes models that may be compatible based on preliminary data. As we continue to gather more information, the list will be updated. If you're unsure about compatibility, do not use this part on your aircraft without confirming compatibility through your repair manuals or other methods.

Product Testing: Every product is inspected for accuracy, quality, and functionality before shipping to ensure it meets our high standards.
Alternate Part Numbers: With the transition from AN to MS and NAS part numbering systems, there are often multiple part numbers that meet the same specifications and performance standards. If only an alternate part number is available, we will contact you to confirm its compatibility with your application. We strongly recommend consulting the appropriate repair manuals to ensure accuracy before using an alternate part.
Model Compatibility: We are committed to providing accurate and up-to-date compatibility information for our parts. While the listed models reflect verified applications, this list is continually expanding. If your model isn’t listed, it may still be compatible, and we encourage you to consult your repair manuals to verify the required part number before placing an order. Additionally, if you believe a model should be listed, please contact us so we can update our records accordingly.
Condition: New Surplus - These parts are classified as new and unused, meaning they have not been installed or placed into service. However, they come without traceability or original manufacturer certifications, which might be required for certain high-level regulatory uses. Our company provides its own Certificate of Conformance (CoC) as a statement of assurance that the parts are in good working condition and have been sourced from reliable channels. These are ideal when the focus is on cost-effectiveness without compromising on quality.
Unit of Sale: Sold Per Each - This item is sold individually, with the price listed for a single unit. Perfect for purchasing the exact quantity needed without the requirement to buy in bulk. For larger quantities, consider reviewing any available bulk pricing options.

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