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4209304 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4209304: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include width: 6.0 MILLIMETERS NOMINAL MM, material: STEEL AND ZINC OVERALL, hole_diameter: 23.0 MILLIMETERS NOMINAL MM, heat_treatment: HARDENED, overall_diameter: 40.0 MILLIMETERS NOMINAL MM, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-679-4181, 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
4209304
NSN: 5310-01-679-4181
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
width6.0 MILLIMETERS NOMINAL MM
materialSTEEL AND ZINC OVERALL
hole_diameter23.0 MILLIMETERS NOMINAL MM
heat_treatmentHARDENED
overall_diameter40.0 MILLIMETERS NOMINAL MM
surface_treatmentZINC OVERALL
center_hole_shape_styleROUND
end_item_identification2320-01-534-1887;TRUCK,CARGO
part_name_assigned_by_controlling_agencyWASH,FLT M24X44X6 ZC HDN
NSN5310-01-679-4181
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4209304 · 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
•
OVERALL DIAMETER: 40.0 MILLIMETERS NOMINAL MM
•
HEAT TREATMENT: HARDENED
•
SURFACE TREATMENT: ZINC OVERALL
•
WIDTH: 6.0 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL AND ZINC OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER40.0 MILLIMETERS NOMINAL MM
HEAT TREATMENTHARDENED
SURFACE TREATMENTZINC OVERALL
WIDTH6.0 MILLIMETERS NOMINAL MM
PART NAME ASSIGNED BY CONTROLLING AGENCYWASH,FLT M24X44X6 ZC HDN
END ITEM IDENTIFICATION2320-01-534-1887;TRUCK,CARGO
MATERIALSTEEL AND ZINC OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER23.0 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

No substitute or cross-reference records for this part.

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 4209304?
4209304 is a WASHER,FLAT.
What is the NSN for 4209304?
4209304 is cataloged in the U.S. Government catalog under NSN 5310-01-679-4181. 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.