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4180403 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4180403: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.140 INCHES MINIMUM IN, thread_class: 2A A, thread_series: UNS, locking_feature: NYLON INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-672-1382, 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
4180403
NSN: 5310-01-672-1382
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.140 INCHES MINIMUM IN
thread_class2A A
thread_seriesUNS
locking_featureNYLON INSERT
thread_directionRIGHT-HAND
width_across_flats0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
nominal_thread_size0.1640 INCHES IN
bearing_surface_typeFLAT
end_item_identificationMRAP - M-ATV
thread_quantity_per_inch32
NSN5310-01-672-1382
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4180403 · 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: 0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
•
THREAD SERIES: UNS
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.1640 INCHES IN
•
LOCKING FEATURE: NYLON INSERT
•
NUT HEIGHT: 0.140 INCHES MINIMUM IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.336 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
THREAD SERIESUNS
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.1640 INCHES IN
LOCKING FEATURENYLON INSERT
NUT HEIGHT0.140 INCHES MINIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, HEX, LKNY 8 - 32 NS SS NS
NUT STYLEHEXAGON
THREAD CLASS2A A
END ITEM IDENTIFICATIONMRAP - M-ATV
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4180403?
4180403 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 4180403?
4180403 is cataloged in the U.S. Government catalog under NSN 5310-01-672-1382. 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.