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31-S-125-1000 — PIN,SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

31-S-125-1000: PIN,SPRING.

The PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 0.125 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, overall_length: 1.000 INCHES NOMINAL IN, hardness_rating: 43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL, special_features: VALVE, end_item_identification: NIMITZ CLASS CVN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-473-9015, 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
31-S-125-1000
NSN: 5315-01-473-9015
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
diameter0.125 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
overall_length1.000 INCHES NOMINAL IN
hardness_rating43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL
special_featuresVALVE
end_item_identificationNIMITZ CLASS CVN
NSN5315-01-473-9015
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31-S-125-1000 · 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
•
HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL
•
DIAMETER: 0.125 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL
DIAMETER0.125 INCHES NOMINAL IN
OVERALL LENGTH1.000 INCHES NOMINAL IN
SPECIAL FEATURESVALVE
END ITEM IDENTIFICATIONNIMITZ CLASS CVN
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
NK-3502-100Reference document
Same NSN cross-reference
Reference document — Secondary reference
NP-769Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
NP-769 PC 13Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 31-S-125-1000?
31-S-125-1000 is a PIN,SPRING.
What parts can replace 31-S-125-1000?
There are 3 known substitutes for 31-S-125-1000: NK-3502-100, NP-769, NP-769 PC 13. Substitute compatibility should be verified for your specific system.
What is the NSN for 31-S-125-1000?
31-S-125-1000 is cataloged in the U.S. Government catalog under NSN 5315-01-473-9015. 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.