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131-926 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

131-926: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-251-0784, 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
131-926
NSN: 5310-01-251-0784
FSC: 5310 — Nuts and Washers
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.675 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
nominal_thread_size0.438 INCHES IN
end_item_identificationNSN 4210-01-486-1035 TFFT (TACTICAL FIRE FIGHTING TRUCK)
washer_outside_diameter0.910 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
NSN5310-01-251-0784
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 131-926 · 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
•
WASHER OUTSIDE DIAMETER: 0.910 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.675 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.910 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.675 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENTZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
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 1
31WLF71614Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 131-926?
131-926 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 131-926?
There is 1 known substitute for 131-926: 31WLF71614. Substitute compatibility should be verified for your specific system.
What is the NSN for 131-926?
131-926 is cataloged in the U.S. Government catalog under NSN 5310-01-251-0784. 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.