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90690-991 — NUT,SELF-LOCKING,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

90690-991: NUT,SELF-LOCKING,ROUND.

The NUT,SELF-LOCKING,ROUND is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-01-166-5314, 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
90690-991
NSN: 5310-01-166-5314
FSC: 5310 — Nuts and Washers
CAGE: 0BAT5 — U.S. DEFENSE SERVICES, INC. DBA USDS (USA)
SPECIFICATIONS
Part Number90690-991
NSN5310-01-166-5314
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90690-991 · 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 5
445-9747Reference document
Same NSN cross-reference
Reference document — Informative reference only
HE011183Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
21262911-204Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
011183Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
E1219120Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 90690-991?
90690-991 is a NUT,SELF-LOCKING,ROUND.
What parts can replace 90690-991?
There are 5 known substitutes for 90690-991: 445-9747, HE011183, 21262911-204 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 90690-991?
90690-991 is cataloged in the U.S. Government catalog under NSN 5310-01-166-5314. 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.