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51-5-2 — 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include phase: SINGLE INPUT, width: 0.500 INCHES IN, length: 20.000 YARDS, diameter: 4.494 INCHES NOMINAL IN, material: COPPER ALLOY TERMINALS, thickness: 0.187 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 5315-00-010-8629, 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
51-5-2
NSN: 5315-00-010-8629
FSC: 5315
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
phaseSINGLE INPUT
width0.500 INCHES IN
length20.000 YARDS
diameter4.494 INCHES NOMINAL IN
materialCOPPER ALLOY TERMINALS
thickness0.187 INCHES NOMINAL IN
body_styleBARRIER TYPE
duty_cycleCONTINUOUS
head_styleFLAT
hole_depth0.3750 INCHES NOMINAL SINGLE END IN
key_height0.295 INCHES NOMINAL IN
oil_grooveINCLUDED
NSN5315-00-010-8629
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 51-5-2 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: STANDARD
•
DIAMETER: 0.094 INCHES NOMINAL IN
•
UNDERLOOP LENGTH: 0.875 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1008 OVERALL
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORSTANDARD
DIAMETER0.094 INCHES NOMINAL IN
UNDERLOOP LENGTH0.875 INCHES NOMINAL IN
MATERIALSTEEL COMP 1008 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
0125000002InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
NMP278PC51InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8332245InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
202729-3420InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2520000402340InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
M2175BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51-5-2?
51-5-2 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 51-5-2?
There are 27 known substitutes for 51-5-2: 0125000002, NMP278PC51, 8332245 and 24 more. Substitute compatibility should be verified for your specific system.
Is 51-5-2 still available?
51-5-2 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: September 2026