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Technical Data Sheet

3/8X1 1/4 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3/8X1 1/4: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OVERALL, overall_width: 0.375 INCHES NOMINAL IN, overall_height: 0.375 INCHES NOMINAL IN, overall_length: 1.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-413-8490, 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
3/8X1 1/4
NSN: 5315-01-413-8490
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OVERALL
overall_width0.375 INCHES NOMINAL IN
overall_height0.375 INCHES NOMINAL IN
overall_length1.250 INCHES NOMINAL IN
NSN5315-01-413-8490
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3/8X1 1/4 · 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
•
MATERIAL: STEEL COMP 1018 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.375 INCHES NOMINAL IN
OVERALL LENGTH1.250 INCHES NOMINAL IN
OVERALL WIDTH0.375 INCHES NOMINAL IN
MATERIALSTEEL COMP 1018 OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
6603141-139Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
JEI-3/8 X 20Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3/8X1 1/4?
3/8X1 1/4 is a KEY,MACHINE.
What parts can replace 3/8X1 1/4?
There are 2 known substitutes for 3/8X1 1/4: 6603141-139, JEI-3/8 X 20. Substitute compatibility should be verified for your specific system.
What is the NSN for 3/8X1 1/4?
3/8X1 1/4 is cataloged in the U.S. Government catalog under NSN 5315-01-413-8490. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.