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1137018 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1137018: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL NUT, nut_style: HEXAGON, nut_height: 0.225 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNEF, locking_feature: SELF-LOCKING. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-563-4714, 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
1137018
NSN: 5310-01-563-4714
FSC: 5310 — Nuts and Washers
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_styleHEXAGON
nut_height0.225 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNEF
locking_featureSELF-LOCKING
special_featuresDIAMETER: 0.25 IN; THICKNESS: 0.313 IN; THREAD SIZE: 20; NYLON INSERT; WRENCH SIZE: 7/16 IN IN
thread_directionRIGHT-HAND
surface_treatmentZINC NUT
width_across_flats0.488 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-563-4714
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1137018 · 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: 0.488 INCHES NOMINAL IN
•
THREAD SERIES: UNEF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LOCKING FEATURE: SELF-LOCKING
•
NUT HEIGHT: 0.225 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.488 INCHES NOMINAL IN
THREAD SERIESUNEF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
LOCKING FEATURESELF-LOCKING
NUT HEIGHT0.225 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
SPECIAL FEATURESDIAMETER: 0.25 IN; THICKNESS: 0.313 IN; THREAD SIZE: 20; NYLON INSERT; WRENCH SIZE: 7/16 IN IN
SURFACE TREATMENTZINC NUT
INSIDE WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYLOCK NUT, 1/4-20
SUBSTITUTES & CROSS-REFERENCES 1
138107Same 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 1137018?
1137018 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 1137018?
There is 1 known substitute for 1137018: 138107. Substitute compatibility should be verified for your specific system.
What is the NSN for 1137018?
1137018 is cataloged in the U.S. Government catalog under NSN 5310-01-563-4714. 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.