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938309 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

938309: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN, hole_diameter: 0.443 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, overall_diameter: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, surface_treatment: OXIDE FILM OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-527-5580, 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
938309
NSN: 5310-00-527-5580
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
thickness0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
hole_diameter0.443 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
overall_diameter0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
surface_treatmentOXIDE FILM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-13924,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-527-5580
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 938309 · 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-C-13924,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1020 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORBLACK OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1020 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.443 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
FF-W-92B TY A GR 11 CL AReference document
Same NSN cross-reference
Reference document — Identification reference
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 938309?
938309 is a WASHER,FLAT.
What parts can replace 938309?
There is 1 known substitute for 938309: FF-W-92B TY A GR 11 CL A. Substitute compatibility should be verified for your specific system.
What is the NSN for 938309?
938309 is cataloged in the U.S. Government catalog under NSN 5310-00-527-5580. 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.