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380957004 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

380957004: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1021 OVERALL, thickness: 0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, hole_diameter: 0.531 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN, overall_diameter: 1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-595-5839, 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
380957004
NSN: 5310-00-595-5839
FSC: 5310 — Nuts and Washers
CAGE: 63734 — KAITLIN CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1021 OVERALL
thickness0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
hole_diameter0.531 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
overall_diameter1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-595-5839
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 380957004 · 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: 1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1021 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.531 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
•
THICKNESS: 0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.719 INCHES MINIMUM AND 1.781 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1021 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.531 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
THICKNESS0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 9
GTB5400Reference document
Same NSN cross-reference
Reference document — Secondary reference
34A2178Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
358171Reference document
Same NSN cross-reference
Reference document — Secondary reference
42E7Y220Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BB1774Reference document
Same NSN cross-reference
Reference document — Secondary reference
127312Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 380957004?
380957004 is a WASHER,FLAT.
What parts can replace 380957004?
There are 9 known substitutes for 380957004: GTB5400, 34A2178, 358171 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 380957004?
380957004 is cataloged in the U.S. Government catalog under NSN 5310-00-595-5839. 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.