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PartsTable / COMPONENT / 3-7263-141
3-7263-141 ✓ 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 WASHER,KEY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 0.478 INCHES MINIMUM AND 0.481 INCHES MAXIMUM IN, outside_diameter: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: NICKEL OVERALL, material_thickness: 0.025 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-194-3667, 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
3-7263-141
NSN: 5310-01-194-3667
FSC: 5310
CAGE: 76854 — ELECTRO SWITCH CORP. DBA OAK GRISGSBY DIV ELECTROSWITCH (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.478 INCHES MINIMUM AND 0.481 INCHES MAXIMUM IN
outside_diameter0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentNICKEL OVERALL
material_thickness0.025 INCHES NOMINAL IN
internal_prebent_key_width0.067 INCHES NOMINAL IN
internal_prebent_key_length0.053 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
material_document_and_classificationQQ-B-611,COMP C,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-194-3667
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3-7263-141 · 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
•
OUTSIDE DIAMETER: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-611,COMP C,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
STYLE DESIGNATOR: KEY
•
INTERNAL PREBENT KEY WIDTH: 0.067 INCHES NOMINAL IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
INTERNAL PREBENT KEY LENGTH: 0.053 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-611,COMP C,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORKEY
INTERNAL PREBENT KEY WIDTH0.067 INCHES NOMINAL IN
SURFACE TREATMENTNICKEL OVERALL
INTERNAL PREBENT KEY LENGTH0.053 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.478 INCHES MINIMUM AND 0.481 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
51626Interchangeable
interchangeable cross-reference
interchangeable
51380Interchangeable
interchangeable cross-reference
interchangeable
51381Interchangeable
interchangeable cross-reference
interchangeable
PH3562Interchangeable
interchangeable cross-reference
interchangeable
014030001Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3-7263-141?
3-7263-141 is a WASHER,KEY.
What parts can replace 3-7263-141?
There are 5 known substitutes for 3-7263-141: 51626, 51380, 51381 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-7263-141?
3-7263-141 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-194-3667. 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