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LS1091389 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

LS1091389: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-00-550-1130, 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
LS1091389
NSN: 5310-00-550-1130
NIINs: 005501130, 016190226, 016190227, 016190228, 016190231, 016190233, 016477161, 016509036, 016510930
FSC: 5310 — Nuts and Washers
CAGE: 01417 — GENERAL DYNAMICS LAND SYSTEMS INC. (USA)
SPECIFICATIONS
Part NumberLS1091389
NSN5310-00-550-1130
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: LS1091389 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES 9
8247-28-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
CSA20042Reference document
Same NSN cross-reference
Reference document — Secondary reference
AA55609-40Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS35333-40Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
138437Reference document
Same NSN cross-reference
Reference document — Secondary reference
138167Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is LS1091389?
LS1091389 is a WASHER,LOCK.
What parts can replace LS1091389?
There are 9 known substitutes for LS1091389: 8247-28-8, CSA20042, AA55609-40 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LS1091389?
LS1091389 is cataloged in the U.S. Government catalog under NSN 5310-00-550-1130. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.