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251262 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

251262: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), hardness_rating: 121.0 BRINELL STANDARD MINIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-880-7744, 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
251262
NSN: 5310-00-880-7744
NIINs: 008807744, 013343436
FSC: 5310 — Nuts and Washers
CAGE: H0001 — DAF TRUCKS N.V. (NLD)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
hardness_rating121.0 BRINELL STANDARD MINIMUM
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
end_item_identificationMRAP BUFFALO MK2A2
NSN5310-00-880-7744
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 251262 · 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: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: SAE/AMS OR ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
HARDNESS RATING: 121.0 BRINELL STANDARD MINIMUM
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NUT HEIGHT: 0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONSAE/AMS OR ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING121.0 BRINELL STANDARD MINIMUM
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
NUT HEIGHT0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 9
16A4C2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
012316-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
FFS836Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
9414034Reference document
Same NSN cross-reference
Reference document — Secondary reference
0F44-0599-00Reference document
Same NSN cross-reference
Reference document — Secondary reference
139JA3Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 251262?
251262 is a NUT,PLAIN,HEXAGON.
What parts can replace 251262?
There are 9 known substitutes for 251262: 16A4C2, 012316-8, FFS836 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 251262?
251262 is cataloged in the U.S. Government catalog under NSN 5310-00-880-7744. This indicates validated use in U.S. government and defense supply chains.
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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.