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51263R — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

51263R: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL, first_end_style: CHAMFERED, pin_overall_length: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN, pin_overall_diameter: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN, first_end_taper_angle: 15.0 DEGREES NOMINAL, first_end_taper_length: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-364-5659, 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
51263R
NSN: 5315-00-364-5659
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL
first_end_styleCHAMFERED
pin_overall_length0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
pin_overall_diameter0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
first_end_taper_angle15.0 DEGREES NOMINAL
first_end_taper_length0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-364-5659
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 51263R · 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
•
FIRST END TAPER LENGTH: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
FIRST END STYLE: CHAMFERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
FIRST END TAPER ANGLE: 15.0 DEGREES NOMINAL
•
PIN OVERALL DIAMETER: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL
TECHNICAL CHARACTERISTICS
FIRST END TAPER LENGTH0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
FIRST END STYLECHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
FIRST END TAPER ANGLE15.0 DEGREES NOMINAL
PIN OVERALL DIAMETER0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL COMP 1015 OR STEEL COMP 1120 OR STEEL COMP 1112 OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
81MCL1Reference document
Same NSN cross-reference
Reference document — Secondary reference
4642AReference document
Same NSN cross-reference
Reference document — Secondary reference
2443PC4642AReference document
Same NSN cross-reference
Reference document — Secondary reference
2BL01221Reference document
Same NSN cross-reference
Reference document — Secondary reference
643476Reference document
Same NSN cross-reference
Reference document — Secondary reference
1A9686Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 51263R?
51263R is a PIN,STRAIGHT,HEADLESS.
What parts can replace 51263R?
There are 7 known substitutes for 51263R: 81MCL1, 4642A, 2443PC4642A and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51263R?
51263R is cataloged in the U.S. Government catalog under NSN 5315-00-364-5659. This indicates validated use in U.S. government and defense supply chains.
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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.