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0HDW7 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0HDW7: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, thickness: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN, hole_diameter: 0.216 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, overall_diameter: 0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-243-7537, 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
0HDW7
NSN: 5310-00-243-7537
FSC: 5310 — Nuts and Washers
CAGE: 0HDW7 — HUCK INTERNATIONAL, INC. DIV HUCK PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
thickness0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
hole_diameter0.216 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
overall_diameter0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-F-14072 FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-243-7537
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0HDW7 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 302 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.375 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 302 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.216 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
THICKNESS0.020 INCHES MINIMUM AND 0.030 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 4
993336-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
R98FB003Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
D747-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
A312A200-101Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 0HDW7?
0HDW7 is a WASHER,FLAT.
What parts can replace 0HDW7?
There are 4 known substitutes for 0HDW7: 993336-3, R98FB003, D747-8 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0HDW7?
0HDW7 is cataloged in the U.S. Government catalog under NSN 5310-00-243-7537. 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.