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PartsTable / COMPONENT / SCB69903
SCB69903 ✓ 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,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, material: STEEL OVERALL, overall_length: 7.375 INCHES MINIMUM AND 7.406 INCHES MAXIMUM IN, undercut_width: 0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN, first_end_style: CHAMFERED, effective_length: 4.702 INCHES MINIMUM AND 4.706 INCHES MAXIMUM 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 5315-00-537-7647, 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
SCB69903
NSN: 5315-00-537-7647
FSC: 5315
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
diameter0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
materialSTEEL OVERALL
overall_length7.375 INCHES MINIMUM AND 7.406 INCHES MAXIMUM IN
undercut_width0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN
first_end_styleCHAMFERED
effective_length4.702 INCHES MINIMUM AND 4.706 INCHES MAXIMUM IN
style_designatorGROOVE
undercut_diameter0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
first_end_locationBOTH ENDS
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-537-7647
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SCB69903 · 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 LOCATION: BOTH ENDS
•
DIAMETER: 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
EFFECTIVE LENGTH: 4.702 INCHES MINIMUM AND 4.706 INCHES MAXIMUM IN
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
•
UNDERCUT WIDTH: 0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN
•
FIRST END TAPER LENGTH: 0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END LOCATIONBOTH ENDS
DIAMETER0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
EFFECTIVE LENGTH4.702 INCHES MINIMUM AND 4.706 INCHES MAXIMUM IN
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
OVERALL LENGTH7.375 INCHES MINIMUM AND 7.406 INCHES MAXIMUM IN
UNDERCUT WIDTH0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN
FIRST END TAPER LENGTH0.005 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN
FIRST END STYLECHAMFERED
UNDERCUT DIAMETER0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
Q1775Interchangeable
interchangeable cross-reference
interchangeable
0910505-7Interchangeable
interchangeable cross-reference
interchangeable
1X8Interchangeable
interchangeable cross-reference
interchangeable
A220090Interchangeable
interchangeable cross-reference
interchangeable
305109Interchangeable
interchangeable cross-reference
interchangeable
50808Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SCB69903?
SCB69903 is a PIN,GROOVED,HEADLESS.
What parts can replace SCB69903?
There are 10 known substitutes for SCB69903: Q1775, 0910505-7, 1X8 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SCB69903?
SCB69903 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-537-7647. 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