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A1/8X 5/16 — Technical Data Sheet

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— · 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 material: STEEL OVERALL, overall_length: 0.312 INCHES NOMINAL IN, first_end_style: OVAL, style_designator: FULL LENGTH GROOVE, first_end_location: BOTH ENDS, first_end_outer_radius: 0.156 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 5315-01-250-3405, 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
A1/8X 5/16
NSN: 5315-01-250-3405
FSC: 5315
CAGE: 83584 — DRIV-LOK INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length0.312 INCHES NOMINAL IN
first_end_styleOVAL
style_designatorFULL LENGTH GROOVE
first_end_locationBOTH ENDS
first_end_outer_radius0.156 INCHES NOMINAL IN
pin_large_end_diameter0.134 INCHES NOMINAL IN
pin_small_end_diameter0.125 INCHES NOMINAL IN
second_end_relationship_with_first_endIDENTICAL
NSN5315-01-250-3405
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A1/8X 5/16 · 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
•
STYLE DESIGNATOR: FULL LENGTH GROOVE
•
MATERIAL: STEEL OVERALL
•
FIRST END STYLE: OVAL
•
PIN LARGE END DIAMETER: 0.134 INCHES NOMINAL IN
•
FIRST END LOCATION: BOTH ENDS
•
FIRST END OUTER RADIUS: 0.156 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
STYLE DESIGNATORFULL LENGTH GROOVE
MATERIALSTEEL OVERALL
OVERALL LENGTH0.312 INCHES NOMINAL IN
FIRST END STYLEOVAL
PIN LARGE END DIAMETER0.134 INCHES NOMINAL IN
FIRST END LOCATIONBOTH ENDS
FIRST END OUTER RADIUS0.156 INCHES NOMINAL IN
PIN SMALL END DIAMETER0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
2-659Interchangeable
interchangeable cross-reference
interchangeable
103904-1Interchangeable
interchangeable cross-reference
interchangeable
2659-102Interchangeable
interchangeable cross-reference
interchangeable
HL18851PC80Interchangeable
interchangeable cross-reference
interchangeable
5335Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1/8X 5/16?
A1/8X 5/16 is a PIN,GROOVED,HEADLESS.
What parts can replace A1/8X 5/16?
There are 5 known substitutes for A1/8X 5/16: 2-659, 103904-1, 2659-102 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A1/8X 5/16?
A1/8X 5/16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-250-3405. 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: September 2026