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,LOCK is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-557-0878, 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
55000407
NSN:5310-01-557-0878 FSC:5310 CAGE:0F875 — GENERAL DYNAMICS ORDNANCE AND TACTICAL SYSTEMS, INC. (USA)
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FREQUENTLY ASKED QUESTIONS
What is 55000407?
55000407 is a WASHER,LOCK.
What parts can replace 55000407?
There are 6 known substitutes for 55000407: 33892, 119982, STB390007BLK and 3 more. Substitute compatibility should be verified for your specific system.
Is 55000407 still available?
55000407 is currently cancelled.
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