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7707981 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7707981: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL, recess_depth: 0.2645 INCHES NOMINAL IN, hole_diameter: 0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN, overall_height: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, outside_diameter: 1.351 INCHES MINIMUM AND 1.366 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-770-7981, 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
7707981
NSN: 5310-00-770-7981
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
recess_depth0.2645 INCHES NOMINAL IN
hole_diameter0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
overall_height0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
outside_diameter1.351 INCHES MINIMUM AND 1.366 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.048 INCHES NOMINAL IN
material_document_and_classificationQQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-770-7981
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7707981 · 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: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 1.351 INCHES MINIMUM AND 1.366 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.2645 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.048 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
•
HOLE DIAMETER: 0.640 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER1.351 INCHES MINIMUM AND 1.366 INCHES MAXIMUM IN
RECESS DEPTH0.2645 INCHES NOMINAL IN
MATERIAL THICKNESS0.048 INCHES NOMINAL IN
MATERIALSTEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
HOLE DIAMETER0.640 INCHES MINIMUM AND 0.650 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 3
6765687Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
03S683-211Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5310007707981Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 7707981?
7707981 is a WASHER,RECESSED.
What parts can replace 7707981?
There are 3 known substitutes for 7707981: 6765687, 03S683-211, 5310007707981. Substitute compatibility should be verified for your specific system.
What is the NSN for 7707981?
7707981 is cataloged in the U.S. Government catalog under NSN 5310-00-770-7981. 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.