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521171 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

521171: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, heat_treatment: AS FABRICATED, surface_treatment: CADMIUM OVERALL, material_document_and_classification: AMS 2400 ASSN STD SINGLE MATERIAL RESPONSE OVERALL, surface_treatment_document_and_classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-308-3713, 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
521171
NSN: 5310-00-308-3713
FSC: 5310 — Nuts and Washers
CAGE: 03104 — TELEDYNE BROWN ENGINEERING, INC. DBA TELEDYNE TURBINE ENGINES DIV TELEDYNE TURBINE ENGINES (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
heat_treatmentAS FABRICATED
surface_treatmentCADMIUM OVERALL
material_document_and_classificationAMS 2400 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-308-3713
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 521171 · 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
•
HEAT TREATMENT: AS FABRICATED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL COMP 1010 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
HEAT TREATMENTAS FABRICATED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL COMP 1010 OVERALL
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
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 521171?
521171 is a WASHER,KEY.
What is the NSN for 521171?
521171 is cataloged in the U.S. Government catalog under NSN 5310-00-308-3713. 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.