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12759-01291 — Technical Data Sheet

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— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 1.018 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNS, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5310-01-597-5914, 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
12759-01291
NSN: 5310-01-597-5914
FSC: 5310
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height1.018 INCHES NOMINAL IN
thread_class2B
thread_seriesUNS
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresZINC FINISH GRADE C TOP LOCK NUT
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats1.500 INCHES NOMINAL IN
nominal_thread_size1.000 INCHES IN
bearing_surface_typeFLAT
NSN5310-01-597-5914
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12759-01291 · 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
•
NUT HEIGHT: 1.018 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
WIDTH ACROSS FLATS: 1.500 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 14
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
TECHNICAL CHARACTERISTICS
NUT HEIGHT1.018 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD CLASS2B
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
WIDTH ACROSS FLATS1.500 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH14
NOMINAL THREAD SIZE1.000 INCHES IN
THREAD SERIESUNS
BEARING SURFACE TYPEFLAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
352-0611-020InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
37318InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
104256InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12759-01291?
12759-01291 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 12759-01291?
There are 3 known substitutes for 12759-01291: 352-0611-020, 37318, 104256. Substitute compatibility should be verified for your specific system.
What is the NSN for 12759-01291?
12759-01291 is cataloged in the Federal Logistics Information System under NSN 5310-01-597-5914. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026