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12500728 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12500728: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, hole_diameter: 5.4 MILLIMETERS NOMINAL MM, outside_diameter: 9.2 MILLIMETERS NOMINAL MM, end_item_identification: AN/SQH-4B UNIT 13, SSS TOWFISH; MRAP - M-ATV W/CS13 POP AND SNE. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-562-4905, 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
12500728
NSN: 5310-01-562-4905
FSC: 5310 — Nuts and Washers
CAGE: 52315 — KLEIN MARINE SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
hole_diameter5.4 MILLIMETERS NOMINAL MM
outside_diameter9.2 MILLIMETERS NOMINAL MM
end_item_identificationAN/SQH-4B UNIT 13, SSS TOWFISH; MRAP - M-ATV W/CS13 POP AND SNE
NSN5310-01-562-4905
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12500728 · 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
•
OUTSIDE DIAMETER: 9.2 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL COMP 316 OVERALL
•
HOLE DIAMETER: 5.4 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER9.2 MILLIMETERS NOMINAL MM
END ITEM IDENTIFICATIONAN/SQH-4B UNIT 13, SSS TOWFISH; MRAP - M-ATV W/CS13 POP AND SNE
MATERIALSTEEL COMP 316 OVERALL
HOLE DIAMETER5.4 MILLIMETERS NOMINAL MM
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
100-109440Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 12500728?
12500728 is a WASHER,LOCK.
What parts can replace 12500728?
There is 1 known substitute for 12500728: 100-109440. Substitute compatibility should be verified for your specific system.
What is the NSN for 12500728?
12500728 is cataloged in the U.S. Government catalog under NSN 5310-01-562-4905. 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.