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135B5661-4 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

135B5661-4: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.066 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, outside_diameter: 0.960 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-495-7986, 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
135B5661-4
NSN: 5310-00-495-7986
FSC: 5310 — Nuts and Washers
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.066 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
outside_diameter0.960 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
style_designatorRECESSED
NSN5310-00-495-7986
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 135B5661-4 · 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
•
HEAT TREATMENT: AS FABRICATED
•
STYLE DESIGNATOR: RECESSED
•
OUTSIDE DIAMETER: 0.960 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.066 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAT TREATMENTAS FABRICATED
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER0.960 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.066 INCHES MINIMUM AND 0.072 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 1
13585661-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 135B5661-4?
135B5661-4 is a WASHER,RECESSED.
What parts can replace 135B5661-4?
There is 1 known substitute for 135B5661-4: 13585661-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 135B5661-4?
135B5661-4 is cataloged in the U.S. Government catalog under NSN 5310-00-495-7986. 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.