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D304821-53 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

D304821-53: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 4.530 INCHES NOMINAL IN, overall_height: 0.440 INCHES NOMINAL IN, outside_diameter: 5.817 INCHES NOMINAL IN, material_thickness: 0.055 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-367-7031, 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
D304821-53
NSN: 5310-00-367-7031
FSC: 5310 — Nuts and Washers
CAGE: 16603 — CONTROL FLOW, INC. DBA WESTECH HEAVY MACHINERY DIVISION DIV WESTECH HEAVY MACHINERY DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter4.530 INCHES NOMINAL IN
overall_height0.440 INCHES NOMINAL IN
outside_diameter5.817 INCHES NOMINAL IN
material_thickness0.055 INCHES NOMINAL IN
NSN5310-00-367-7031
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: D304821-53 · 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: 5.817 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.055 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 4.530 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.440 INCHES NOMINAL IN
OUTSIDE DIAMETER5.817 INCHES NOMINAL IN
MATERIAL THICKNESS0.055 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
HOLE DIAMETER4.530 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 2
W5817-055Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
22RK94Same 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 D304821-53?
D304821-53 is a WASHER,SPRING TENSION.
What parts can replace D304821-53?
There are 2 known substitutes for D304821-53: W5817-055, 22RK94. Substitute compatibility should be verified for your specific system.
What is the NSN for D304821-53?
D304821-53 is cataloged in the U.S. Government catalog under NSN 5310-00-367-7031. 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.