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278997 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

278997: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.804 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN, overall_height: 0.073 INCHES NOMINAL IN, outside_diameter: 0.935 INCHES NOMINAL IN, material_thickness: 0.0125 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN, material_document_and_classification: VS1-1-8-13 FSCM 62983 MFR REF SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-104-7712, 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
278997
NSN: 5310-00-104-7712
FSC: 5310 — Nuts and Washers
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.804 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN
overall_height0.073 INCHES NOMINAL IN
outside_diameter0.935 INCHES NOMINAL IN
material_thickness0.0125 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN
material_document_and_classificationVS1-1-8-13 FSCM 62983 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-104-7712
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 278997 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: VS1-1-8-13 FSCM 62983 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.935 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.0125 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.804 INCHES MINIMUM AND 0.814 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.073 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONVS1-1-8-13 FSCM 62983 MFR REF SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.935 INCHES NOMINAL IN
MATERIAL THICKNESS0.0125 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.804 INCHES MINIMUM AND 0.814 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

No substitute or cross-reference records for this part.

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 278997?
278997 is a WASHER,SPRING TENSION.
What is the NSN for 278997?
278997 is cataloged in the U.S. Government catalog under NSN 5310-00-104-7712. 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.