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3-21253 — DISK,CLUTCH,VEHICULAR

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

3-21253: DISK,CLUTCH,VEHICULAR.

The DISK,CLUTCH,VEHICULAR is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, largest_width: 0.600 INCHES SINGLE END IN, overall_width: 0.718 INCHES IN, overall_length: 1.437 INCHES IN, basic_shape_style: CRIMP, surface_treatment: TIN OVERALL SINGLE LAYER. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-126-5118, 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
MRO→ MRO_GENERAL→ 3-21253
NSN: 5310-00-126-5118
NIINs: 001265118, 006248490, 006834738, 011522507
FSC: 5310 — Nuts and Washers
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialCOPPER OVERALL
largest_width0.600 INCHES SINGLE END IN
overall_width0.718 INCHES IN
overall_length1.437 INCHES IN
basic_shape_styleCRIMP
surface_treatmentTIN OVERALL SINGLE LAYER
material_thickness0.060 INCHES IN
mounting_method_styleSTRAIGHT ONE HOLE
mounting_tongue_width0.718 INCHES IN
mounting_hole_diameter0.385 INCHES IN
mounting_facility_thickness0.060 INCHES IN
conductor_accommodation_typeCLAMPING BARREL EARS SINGLE END
NSN5310-00-126-5118
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3-21253 · 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
•
SHOULDER HEIGHT: 0.031 INCHES NOMINAL IN
•
HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SHOULDERED
•
OUTSIDE DIAMETER: 1.237 INCHES MINIMUM AND 1.242 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 1.030 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.790 INCHES MINIMUM AND 0.800 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.031 INCHES NOMINAL IN
HARDNESS RATING35.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSHOULDERED
OUTSIDE DIAMETER1.237 INCHES MINIMUM AND 1.242 INCHES MAXIMUM IN
MATERIAL THICKNESS0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
SHOULDER DIAMETER1.030 INCHES NOMINAL IN
HOLE DIAMETER0.790 INCHES MINIMUM AND 0.800 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3-21253?
3-21253 is a DISK,CLUTCH,VEHICULAR. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 3-21253?
3-21253 is cataloged in the U.S. Government catalog under NSN 5310-00-126-5118. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.