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939B038979 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

939B038979: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, hole_diameter: 0.3970 INCHES NOMINAL0.3970 INCHES NOMINAL IN, overall_height: 0.0290 INCHES NOMINAL0.0290 INCHES NOMINAL IN, outside_diameter: 0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN, style_designator: SPRING TENSION, material_thickness: 0.0200 INCHES NOMINAL0.0200 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-079-9866, 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
939B038979
NSN: 5310-01-079-9866
FSC: 5310 — Nuts and Washers
CAGE: 34228 — L3 TECHNOLOGIES, INC. DIV L3 KEO (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
hole_diameter0.3970 INCHES NOMINAL0.3970 INCHES NOMINAL IN
overall_height0.0290 INCHES NOMINAL0.0290 INCHES NOMINAL IN
outside_diameter0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN
style_designatorSPRING TENSION
material_thickness0.0200 INCHES NOMINAL0.0200 INCHES NOMINAL IN
end_item_identificationM1 TANK FAMILYM1 TANK FAMILY
material_document_and_classificationASTMA684 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-079-9866
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 939B038979 · 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
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTMA684 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.0200 INCHES NOMINAL0.0200 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1095 OVERALL
•
HOLE DIAMETER: 0.3970 INCHES NOMINAL0.3970 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.0290 INCHES NOMINAL0.0290 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONASTMA684 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.4840 INCHES NOMINAL0.4840 INCHES NOMINAL IN
MATERIAL THICKNESS0.0200 INCHES NOMINAL0.0200 INCHES NOMINAL IN
END ITEM IDENTIFICATIONM1 TANK FAMILYM1 TANK FAMILY
MATERIALSTEEL COMP 1095 OVERALL
HOLE DIAMETER0.3970 INCHES NOMINAL0.3970 INCHES NOMINAL 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 1
W0484-009Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 939B038979?
939B038979 is a WASHER,SPRING TENSION.
What parts can replace 939B038979?
There is 1 known substitute for 939B038979: W0484-009. Substitute compatibility should be verified for your specific system.
What is the NSN for 939B038979?
939B038979 is cataloged in the U.S. Government catalog under NSN 5310-01-079-9866. 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.