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90631A411 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

90631A411: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: PLASTIC NYLON LOCKING INSERT, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT, special_features: ZINC PLATED; GRADE 2, thread_direction: RIGHT-HAND, surface_treatment: ZINC NUT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-527-3369, 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
90631A411
NSN: 5310-01-527-3369
FSC: 5310 — Nuts and Washers
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
materialPLASTIC NYLON LOCKING INSERT
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
special_featuresZINC PLATED; GRADE 2
thread_directionRIGHT-HAND
surface_treatmentZINC NUT
end_item_identification5895-01-495-5977; MRAP BUFFALO MK2A2
part_name_assigned_by_controlling_agencyHEX NYLON-INSERT LOCKNUT
NSN5310-01-527-3369
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90631A411 · 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
KEY FEATURES
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
SURFACE TREATMENT: ZINC NUT
•
MATERIAL: STEEL NUT
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
SPECIAL FEATURESZINC PLATED; GRADE 2
SURFACE TREATMENTZINC NUT
PART NAME ASSIGNED BY CONTROLLING AGENCYHEX NYLON-INSERT LOCKNUT
END ITEM IDENTIFICATION5895-01-495-5977; MRAP BUFFALO MK2A2
MATERIALSTEEL NUT
MATERIALPLASTIC NYLON LOCKING INSERT
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 90631A411?
90631A411 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 90631A411?
90631A411 is cataloged in the U.S. Government catalog under NSN 5310-01-527-3369. 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.