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12938285 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12938285: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 3.520 INCHES NOMINAL IN, outside_diameter: 4.150 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.041 INCHES NOMINAL IN, end_item_identification: USED ON M119A1 TOWED HOWITZER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-370-4831, 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
12938285
NSN: 5310-01-370-4831
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter3.520 INCHES NOMINAL IN
outside_diameter4.150 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.041 INCHES NOMINAL IN
end_item_identificationUSED ON M119A1 TOWED HOWITZER
internal_prebent_key_width0.350 INCHES NOMINAL IN
internal_prebent_key_length0.400 INCHES NOMINAL IN
NSN5310-01-370-4831
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12938285 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.350 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 4.150 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.041 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY LENGTH: 0.400 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 3.520 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.350 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER4.150 INCHES NOMINAL IN
MATERIAL THICKNESS0.041 INCHES NOMINAL IN
INTERNAL PREBENT KEY LENGTH0.400 INCHES NOMINAL IN
END ITEM IDENTIFICATIONUSED ON M119A1 TOWED HOWITZER
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER3.520 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

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 12938285?
12938285 is a WASHER,KEY.
What is the NSN for 12938285?
12938285 is cataloged in the U.S. Government catalog under NSN 5310-01-370-4831. 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.