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643373 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

643373: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, thickness: 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN, hole_diameter: 1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN, overall_diameter: 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-516-3254, 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
643373
NSN: 5310-00-516-3254
FSC: 5310 — Nuts and Washers
CAGE: 58275 — SASCO INC CANADIAN DIV
SPECIFICATIONS
materialPLASTIC OVERALL
thickness0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
hole_diameter1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
overall_diameter1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-516-3254
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 643373 · 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: 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: PLASTIC OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
•
THICKNESS: 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALPLASTIC OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.130 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
THICKNESS0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
022107AReference document
Same NSN cross-reference
Reference document — Secondary reference
041483Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 643373?
643373 is a WASHER,FLAT.
What parts can replace 643373?
There are 2 known substitutes for 643373: 022107A, 041483. Substitute compatibility should be verified for your specific system.
What is the NSN for 643373?
643373 is cataloged in the U.S. Government catalog under NSN 5310-00-516-3254. 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.