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,FLAT 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 5310-01-721-7514, 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
R8321664-43
NSN:5310-01-721-7514 FSC:5310 CAGE:96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
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FREQUENTLY ASKED QUESTIONS
What is R8321664-43?
R8321664-43 is a WASHER,FLAT.
What parts can replace R8321664-43?
There are 9 known substitutes for R8321664-43: KC9125, R437, FF-W-92 TYA and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R8321664-43?
R8321664-43 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-721-7514. This indicates validated use in U.S. government and defense supply chains.
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