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12387302 ✓ 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 WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, special_features: NOMINAL SIZE 0.375 INCHES IN, end_item_identification: 2355-01-481-8573, part_name_assigned_by_controlling_agency: WASHER, LOCK. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-959-4679, 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
12387302
NSN: 5310-00-959-4679
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
special_featuresNOMINAL SIZE 0.375 INCHES IN
end_item_identification2355-01-481-8573
part_name_assigned_by_controlling_agencyWASHER, LOCK
NSN5310-00-959-4679
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12387302 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
1050Interchangeable
interchangeable cross-reference
interchangeable
400-10Interchangeable
interchangeable cross-reference
interchangeable
A2829Interchangeable
interchangeable cross-reference
interchangeable
B107.1 CL1STAInterchangeable
interchangeable cross-reference
interchangeable
AS954Interchangeable
interchangeable cross-reference
interchangeable
B107.1 TY1CL1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12387302?
12387302 is a WASHER,LOCK.
What parts can replace 12387302?
There are 20 known substitutes for 12387302: 1050, 400-10, A2829 and 17 more. Substitute compatibility should be verified for your specific system.
Is 12387302 still available?
12387302 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026