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4031492012 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4031492012: 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: 0.724 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN, thread_class: 2A A, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-669-0690, 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
4031492012
NSN: 5310-01-669-0690
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.724 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN
thread_class2A A
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE
special_featuresDEFORMED THREAD LOCK
thread_directionRIGHT-HAND
width_across_flats1.812 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN
nominal_thread_size1.25 INCHES IN
bearing_surface_typeCHAMFERED
end_item_identification01-641-7505
NSN5310-01-669-0690
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4031492012 · 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: 1.812 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.25 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE
•
NUT HEIGHT: 0.724 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.812 INCHES MINIMUM AND 1.877 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.25 INCHES IN
LOCKING FEATUREPREVAILING TORQUE
NUT HEIGHT0.724 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN
SPECIAL FEATURESDEFORMED THREAD LOCK
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, HEX, LKDT, G8, MB, TAB
NUT STYLEHEXAGON
THREAD CLASS2A A
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4031492012?
4031492012 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 4031492012?
There is 1 known substitute for 4031492012: 4031492. Substitute compatibility should be verified for your specific system.
What is the NSN for 4031492012?
4031492012 is cataloged in the U.S. Government catalog under NSN 5310-01-669-0690. 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.