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12279051 ✓ Verified by PartsTable
— · 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: 0.337 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH METALLIC INSERT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-152-3028, 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
12279051
NSN: 5310-01-152-3028
FSC: 5310
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.337 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH METALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch16
NSN5310-01-152-3028
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12279051 · 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 STYLE: HEXAGON
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
BEARING SURFACE TYPE: FLAT
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 16
•
SURFACE TREATMENT: ZINC OVERALL
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-325,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NOMINAL THREAD SIZE0.375 INCHES IN
BEARING SURFACE TYPEFLAT
THREAD SERIESUNF
THREAD QUANTITY PER INCH16
SURFACE TREATMENTZINC OVERALL
THREAD CLASS2B
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
P140775-1PC103Interchangeable
interchangeable cross-reference
interchangeable
455290SK0Interchangeable
interchangeable cross-reference
interchangeable
2H3853Interchangeable
interchangeable cross-reference
interchangeable
7268Interchangeable
interchangeable cross-reference
interchangeable
A-A-413Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-296Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12279051?
12279051 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 12279051?
There are 16 known substitutes for 12279051: P140775-1PC103, 455290SK0, 2H3853 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12279051?
12279051 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-152-3028. 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: July 2026