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803-5959304-X-74 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

803-5959304-X-74: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 630 OVERALL, thickness: 0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN, hole_diameter: 1.760 INCHES NOMINAL IN, overall_diameter: 2.750 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-329-9769, 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
803-5959304-X-74
NSN: 5310-01-329-9769
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 630 OVERALL
thickness0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
hole_diameter1.760 INCHES NOMINAL IN
overall_diameter2.750 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-C-465 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-329-9769
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 803-5959304-X-74 · 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: 2.750 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-465 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER ALLOY 630 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.760 INCHES NOMINAL IN
•
THICKNESS: 0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER2.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-465 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALCOPPER ALLOY 630 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.760 INCHES NOMINAL IN
THICKNESS0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM 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
256-6603687-VHBM-84Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5959304-74Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 803-5959304-X-74?
803-5959304-X-74 is a WASHER,FLAT.
What parts can replace 803-5959304-X-74?
There are 2 known substitutes for 803-5959304-X-74: 256-6603687-VHBM-84, 5959304-74. Substitute compatibility should be verified for your specific system.
What is the NSN for 803-5959304-X-74?
803-5959304-X-74 is cataloged in the U.S. Government catalog under NSN 5310-01-329-9769. 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.