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PartsTable / COMPONENT / R103B15
R103B15 ✓ 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 PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include first_end_style: CHAMFERED, pin_overall_length: 1.488 INCHES MINIMUM AND 1.512 INCHES MAXIMUM IN, pin_overall_diameter: 0.2495 INCHES MINIMUM AND 0.2505 INCHES MAXIMUM IN, first_end_taper_angle: 25.0 DEGREES NOMINAL, first_end_taper_length: 0.016 INCHES NOMINAL IN, material_document_and_classification: QQ-S-00779 GR3 FED SPEC ALL MATERIAL RESPONSES OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-050-5527, 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
R103B15
NSN: 5315-00-050-5527
FSC: 5315
CAGE: 91340 — MET-PRO CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP W108 OR STEEL COMP W109 OR STEEL COMP W110 OR STEEL COMP W112 OR STEEL COMP W209 OR STEEL COMP W210 OR STEEL COMP W310 OVERALL
first_end_styleCHAMFERED
pin_overall_length1.488 INCHES MINIMUM AND 1.512 INCHES MAXIMUM IN
pin_overall_diameter0.2495 INCHES MINIMUM AND 0.2505 INCHES MAXIMUM IN
first_end_taper_angle25.0 DEGREES NOMINAL
first_end_taper_length0.016 INCHES NOMINAL IN
material_document_and_classificationQQ-S-00779 GR3 FED SPEC ALL MATERIAL RESPONSES OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-050-5527
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R103B15 · 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
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
PIN OVERALL DIAMETER: 0.2495 INCHES MINIMUM AND 0.2505 INCHES MAXIMUM IN
•
FIRST END TAPER ANGLE: 25.0 DEGREES NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-00779 GR3 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
FIRST END TAPER LENGTH: 0.016 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP W108 OR STEEL COMP W109 OR STEEL COMP W110 OR STEEL COMP W112 OR STEEL COMP W209 OR STEEL COMP W210 OR STEEL COMP W310 OVERALL
•
PIN OVERALL LENGTH: 1.488 INCHES MINIMUM AND 1.512 INCHES MAXIMUM IN
•
FIRST END STYLE: CHAMFERED
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL DIAMETER0.2495 INCHES MINIMUM AND 0.2505 INCHES MAXIMUM IN
FIRST END TAPER ANGLE25.0 DEGREES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-00779 GR3 FED SPEC ALL MATERIAL RESPONSES OVERALL
FIRST END TAPER LENGTH0.016 INCHES NOMINAL IN
MATERIALSTEEL COMP W108 OR STEEL COMP W109 OR STEEL COMP W110 OR STEEL COMP W112 OR STEEL COMP W209 OR STEEL COMP W210 OR STEEL COMP W310 OVERALL
PIN OVERALL LENGTH1.488 INCHES MINIMUM AND 1.512 INCHES MAXIMUM IN
FIRST END STYLECHAMFERED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
2550956-7Interchangeable
interchangeable cross-reference
interchangeable
50552-7Interchangeable
interchangeable cross-reference
interchangeable
T314005807Interchangeable
interchangeable cross-reference
interchangeable
6371Interchangeable
interchangeable cross-reference
interchangeable
A-129766Interchangeable
interchangeable cross-reference
interchangeable
129766Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R103B15?
R103B15 is a PIN,STRAIGHT,HEADLESS.
What parts can replace R103B15?
There are 19 known substitutes for R103B15: 2550956-7, 50552-7, T314005807 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R103B15?
R103B15 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-050-5527. 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