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91477A181 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91477A181: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, hole_diameter: 8.4 MILLIMETERS NOMINAL MM, overall_height: 2.6 MILLIMETERS NOMINAL MM, outside_diameter: 18.0 MILLIMETERS NOMINAL MM, style_designator: SPRING TENSION, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-630-2471, 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
91477A181
NSN: 5310-01-630-2471
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
hole_diameter8.4 MILLIMETERS NOMINAL MM
overall_height2.6 MILLIMETERS NOMINAL MM
outside_diameter18.0 MILLIMETERS NOMINAL MM
style_designatorSPRING TENSION
surface_treatmentPASSIVATE OVERALL
material_thickness2.0 MILLIMETERS NOMINAL MM
end_item_identification8145-01-598-4828
NSN5310-01-630-2471
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91477A181 · 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: 18.0 MILLIMETERS NOMINAL MM
•
MATERIAL THICKNESS: 2.0 MILLIMETERS NOMINAL MM
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 304 OVERALL
•
HOLE DIAMETER: 8.4 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT2.6 MILLIMETERS NOMINAL MM
STYLE DESIGNATORSPRING TENSION
OUTSIDE DIAMETER18.0 MILLIMETERS NOMINAL MM
MATERIAL THICKNESS2.0 MILLIMETERS NOMINAL MM
SURFACE TREATMENTPASSIVATE OVERALL
END ITEM IDENTIFICATION8145-01-598-4828
MATERIALSTEEL COMP 304 OVERALL
HOLE DIAMETER8.4 MILLIMETERS NOMINAL MM
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
AEW16X80M000SB8A31Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91477A181?
91477A181 is a WASHER,SPRING TENSION.
What parts can replace 91477A181?
There is 1 known substitute for 91477A181: AEW16X80M000SB8A31. Substitute compatibility should be verified for your specific system.
What is the NSN for 91477A181?
91477A181 is cataloged in the U.S. Government catalog under NSN 5310-01-630-2471. 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.