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51-523 ✓ Verified by PartsTable
Hama · 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 material: STEEL COMP 1010 OVERALL, body_style: STRAIGHT SHAPE, EXTERNAL COUPLING W/BACKSHELL, shell_type: SOLID, thread_class: 2A A, hole_diameter: 1.625 INCHES MINIMUM AND 1.657 INCHES MAXIMUM IN, terminal_type: SOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-276-3012, 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
51-523
NSN: 5310-00-276-3012
FSC: 5310
CAGE: 96147 — SOUTHERN COACHES, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
body_styleSTRAIGHT SHAPE, EXTERNAL COUPLING W/BACKSHELL
shell_typeSOLID
thread_class2A A
hole_diameter1.625 INCHES MINIMUM AND 1.657 INCHES MAXIMUM IN
terminal_typeSOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING
overall_length0.609 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
insert_materialPLASTIC TETRAFLUOROETHYLENE SINGLE MATING END
contact_materialCOPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
outside_diameter2.109 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
overall_diameter0.250 INCHES NOMINAL IN
NSN5310-00-276-3012
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 51-523 · Hama ⚠ 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: SPLIT
•
MATERIAL: STEEL COMP 1010 OVERALL
•
OUTSIDE DIAMETER: 2.109 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
•
HOLE DIAMETER: 1.625 INCHES MINIMUM AND 1.657 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
•
DISTANCE ACROSS SPLIT OPENING: 0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORSPLIT
MATERIALSTEEL COMP 1010 OVERALL
OUTSIDE DIAMETER2.109 INCHES MINIMUM AND 2.141 INCHES MAXIMUM IN
HOLE DIAMETER1.625 INCHES MINIMUM AND 1.657 INCHES MAXIMUM IN
MATERIAL THICKNESS0.032 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN
DISTANCE ACROSS SPLIT OPENING0.046 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
8600-1Interchangeable
interchangeable cross-reference
interchangeable
313096Interchangeable
interchangeable cross-reference
interchangeable
51523Interchangeable
interchangeable cross-reference
interchangeable
7234Interchangeable
interchangeable cross-reference
interchangeable
DM44-4Interchangeable
interchangeable cross-reference
interchangeable
U8600Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51-523?
51-523 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Hama.
What parts can replace 51-523?
There are 19 known substitutes for 51-523: 8600-1, 313096, 51523 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51-523?
51-523 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-276-3012. 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