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2661581 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2661581: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include hole_diameter: 0.160 INCHES NOMINAL IN, overall_height: 0.040 INCHES NOMINAL IN, outside_diameter: 0.400 INCHES NOMINAL IN, style_designator: SPRING TENSION, material_thickness: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-139-6796, 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
2661581
NSN: 5310-01-139-6796
FSC: 5310 — Nuts and Washers
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
hole_diameter0.160 INCHES NOMINAL IN
overall_height0.040 INCHES NOMINAL IN
outside_diameter0.400 INCHES NOMINAL IN
style_designatorSPRING TENSION
material_thickness0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
NSN5310-01-139-6796
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2661581 · 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
•
OUTSIDE DIAMETER: 0.400 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.160 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.040 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
OUTSIDE DIAMETER0.400 INCHES NOMINAL IN
MATERIAL THICKNESS0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
HOLE DIAMETER0.160 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
10159689Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2661581?
2661581 is a WASHER,SPRING TENSION.
What parts can replace 2661581?
There is 1 known substitute for 2661581: 10159689. Substitute compatibility should be verified for your specific system.
What is the NSN for 2661581?
2661581 is cataloged in the U.S. Government catalog under NSN 5310-01-139-6796. 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.