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40A897 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

40A897: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095 OVERALL, hole_diameter: 0.322 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN, overall_height: 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN, outside_diameter: 0.482 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN, style_designator: SPRING TENSION, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-855-6521, 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
40A897
NSN: 5310-00-855-6521
FSC: 5310 — Nuts and Washers
CAGE: 79294 — E-SYSTEMS INC MONTEK DIV FLUID CONTROLS OPNS (USA)
SPECIFICATIONS
materialSTEEL COMP 1095 OVERALL
hole_diameter0.322 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
overall_height0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
outside_diameter0.482 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
style_designatorSPRING TENSION
surface_treatmentCADMIUM OVERALL
material_thickness0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-855-6521
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 40A897 · 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: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.482 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL COMP 1095 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.482 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
MATERIAL THICKNESS0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 1095 OVERALL
HOLE DIAMETER0.322 INCHES MINIMUM AND 0.332 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 40A897?
40A897 is a WASHER,SPRING TENSION.
What is the NSN for 40A897?
40A897 is cataloged in the U.S. Government catalog under NSN 5310-00-855-6521. 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.