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0-40996-171 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0-40996-171: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, hole_diameter: 0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN, overall_height: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN, outside_diameter: 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN, special_features: TWO LEAVES IN SPRING,SPOT WELDED,AND RADIUS REFLEX, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-752-7640, 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
0-40996-171
NSN: 5310-00-752-7640
FSC: 5310 — Nuts and Washers
CAGE: 81941 — REPUBLIC CORP CONSOLIDATED MOLDED PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
hole_diameter0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
overall_height0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
outside_diameter0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
special_featuresTWO LEAVES IN SPRING,SPOT WELDED,AND RADIUS REFLEX
surface_treatmentCADMIUM OVERALL
material_thickness0.019 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
material_document_and_classificationAMS 5121 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-752-7640
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0-40996-171 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5121 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.019 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL COMP 1095 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5121 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN
MATERIAL THICKNESS0.019 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
SPECIAL FEATURESTWO LEAVES IN SPRING,SPOT WELDED,AND RADIUS REFLEX
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 1095 OVERALL
HOLE DIAMETER0.506 INCHES MINIMUM AND 0.526 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 2
2963046Reference document
Same NSN cross-reference
Reference document — Secondary reference
7527640Reference 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 0-40996-171?
0-40996-171 is a WASHER,SPRING TENSION.
What parts can replace 0-40996-171?
There are 2 known substitutes for 0-40996-171: 2963046, 7527640. Substitute compatibility should be verified for your specific system.
What is the NSN for 0-40996-171?
0-40996-171 is cataloged in the U.S. Government catalog under NSN 5310-00-752-7640. 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.