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81-5757 — CONNECTOR,RECEPTACLE,ELECTRICAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

81-5757: CONNECTOR,RECEPTACLE,ELECTRICAL.

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL OVERALL, thickness: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN, body_style: RIGHT ANGLE TYPE, shell_type: SOLID, body_height: 0.120 INCHES NOMINAL IN, hole_diameter: 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-242-5993, 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
81-5757
NSN: 5310-01-242-5993
NIINs: 012425993, 014805373, 014805381
FSC: 5310 — Nuts and Washers
CAGE: U5012 — COUNTRYMAN GROUP LTD (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
body_styleRIGHT ANGLE TYPE
shell_typeSOLID
body_height0.120 INCHES NOMINAL IN
hole_diameter0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
overall_width0.187 INCHES NOMINAL IN
terminal_typeSOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING
overall_length1.676 INCHES NOMINAL IN
contact_materialBERYLLIUM AND COPPER SINGLE MATING END SINGLE CONTACT GROUPING
overall_diameter1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
precious_materialGOLD
NSN5310-01-242-5993
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 81-5757 · 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
•
OVERALL DIAMETER: 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
•
THICKNESS: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
THICKNESS0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
A-25 468 00Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
X-25-15Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 81-5757?
81-5757 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 81-5757?
There are 2 known substitutes for 81-5757: A-25 468 00, X-25-15. Substitute compatibility should be verified for your specific system.
What is the NSN for 81-5757?
81-5757 is cataloged in the U.S. Government catalog under NSN 5310-01-242-5993. This indicates validated use in U.S. government and defense supply chains.
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