Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW
The WASHER is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-333-7432, indicating validated use in U.S.
government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.
WHERE IT FITS
1A7390
NSN:5310-00-333-7432 FSC:5310 CAGE:95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
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FREQUENTLY ASKED QUESTIONS
What is 1A7390?
1A7390 is a WASHER.
What parts can replace 1A7390?
There are 6 known substitutes for 1A7390: 4044210, BB607, 74044210 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A7390?
1A7390 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-333-7432. This indicates validated use in U.S. government and defense supply chains.
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