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7X-0579 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7X-0579: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.079 INCHES NOMINAL IN, outside_diameter: 1.004 INCHES NOMINAL IN, overall_diameter: 0.346 INCHES NOMINAL IN, special_features: WASHER-HARD (8.8X25.5X2-M THK), surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-433-5837, 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
7X-0579
NSN: 5310-01-433-5837
NIINs: 014335837, 015635517
FSC: 5310 — Nuts and Washers
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.079 INCHES NOMINAL IN
outside_diameter1.004 INCHES NOMINAL IN
overall_diameter0.346 INCHES NOMINAL IN
special_featuresWASHER-HARD (8.8X25.5X2-M THK)
surface_treatmentZINC OVERALL
end_item_identification3805-01-550-0883;MULTI TERRAIN LOADER
part_name_assigned_by_controlling_agencyWASHER
NSN5310-01-433-5837
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7X-0579 · 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: 25.5 MILLIMETERS NOMINAL MM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 8.8 MILLIMETERS NOMINAL MM
•
THICKNESS: 2.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER25.5 MILLIMETERS NOMINAL MM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER8.8 MILLIMETERS NOMINAL MM
THICKNESS2.0 MILLIMETERS NOMINAL MM
SUBSTITUTES & CROSS-REFERENCES 1
3731879Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7X-0579?
7X-0579 is a WASHER,FLAT.
What parts can replace 7X-0579?
There is 1 known substitute for 7X-0579: 3731879. Substitute compatibility should be verified for your specific system.
What is the NSN for 7X-0579?
7X-0579 is cataloged in the U.S. Government catalog under NSN 5310-01-433-5837. 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.