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12592028 — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12592028: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 1.630 INCHES NOMINAL IN, hardness_rating: 31.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, outside_diameter: 2.510 INCHES NOMINAL IN, material_thickness: 0.185 INCHES NOMINAL IN, external_keyway_width: 0.178 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-342-6643, 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
12592028
NSN: 5310-01-342-6643
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.630 INCHES NOMINAL IN
hardness_rating31.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
outside_diameter2.510 INCHES NOMINAL IN
material_thickness0.185 INCHES NOMINAL IN
external_keyway_width0.178 INCHES NOMINAL IN
external_keyway_length1.165 INCHES NOMINAL IN
end_item_identificationM119A1 HOWITZER
external_keyway_quantity10
NSN5310-01-342-6643
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12592028 · 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
•
EXTERNAL KEYWAY WIDTH: 0.178 INCHES NOMINAL IN
•
EXTERNAL KEYWAY QUANTITY: 10
•
HARDNESS RATING: 31.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
OUTSIDE DIAMETER: 2.510 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.185 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 1.630 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL KEYWAY WIDTH0.178 INCHES NOMINAL IN
EXTERNAL KEYWAY QUANTITY10
HARDNESS RATING31.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
OUTSIDE DIAMETER2.510 INCHES NOMINAL IN
MATERIAL THICKNESS0.185 INCHES NOMINAL IN
END ITEM IDENTIFICATIONM119A1 HOWITZER
MATERIALSTEEL OVERALL
HOLE DIAMETER1.630 INCHES NOMINAL IN
EXTERNAL KEYWAY LENGTH1.165 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 12592028?
12592028 is a WASHER,KEYWAY.
What is the NSN for 12592028?
12592028 is cataloged in the U.S. Government catalog under NSN 5310-01-342-6643. 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.