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4031492004 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4031492004: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.365 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN, thread_series: UNF, locking_feature: PREVAILING TORQUE ALL METAL DESIGN, special_features: LOCKING FEATURE: DEFORMED THREADS; COLOR: BLACK. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-657-4040, 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
4031492004
NSN: 5310-01-657-4040
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.365 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresLOCKING FEATURE: DEFORMED THREADS; COLOR: BLACK
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE ZINC OVERALL
width_across_flats0.675 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
nominal_thread_size0.44 INCHES IN
bearing_surface_typeCHAMFERED OR FLAT
end_item_identificationMRAP - M-ATV UI
NSN5310-01-657-4040
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4031492004 · 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
•
WIDTH ACROSS FLATS: 0.675 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.44 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT HEIGHT: 0.365 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.675 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.44 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.365 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
SPECIAL FEATURESLOCKING FEATURE: DEFORMED THREADS; COLOR: BLACK
SURFACE TREATMENTPHOSPHATE ZINC OVERALL
NUT STYLEHEXAGON
END ITEM IDENTIFICATIONMRAP - M-ATV UI
SUBSTITUTES & CROSS-REFERENCES 1
4031492Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 4031492004?
4031492004 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 4031492004?
There is 1 known substitute for 4031492004: 4031492. Substitute compatibility should be verified for your specific system.
What is the NSN for 4031492004?
4031492004 is cataloged in the U.S. Government catalog under NSN 5310-01-657-4040. 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.