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501312 ✓ 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 501312 is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL; 12VDC VDC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-004-2201, 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
501312
NSN: 5310-00-004-2201
FSC: 5310
CAGE: 82340 — L3HARRIS TECHNOLOGIES, INC. DIV SPACE AND AIRBORNE SYSTEMS (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL; 12VDC VDC
NSN5310-00-004-2201
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 501312 · 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
•
PILOT DIAMETER: 0.186 INCHES NOMINAL IN
•
PILOT LENGTH: 0.087 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 32
•
NUT STYLE: CLINCH
•
NUT DIAMETER: 0.283 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PILOT DIAMETER0.186 INCHES NOMINAL IN
PILOT LENGTH0.087 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.138 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH32
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
NUT STYLECLINCH
NUT DIAMETER0.283 INCHES NOMINAL IN
NUT HEIGHT0.157 INCHES NOMINAL IN
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
501-31-2Interchangeable
interchangeable cross-reference
interchangeable
501-31Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501312?
501312 is a 501312.
What parts can replace 501312?
There are 2 known substitutes for 501312: 501-31-2, 501-31. Substitute compatibility should be verified for your specific system.
What is the NSN for 501312?
501312 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-004-2201. 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