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8519340 — SPRING,HELICAL,EXTENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8519340: SPRING,HELICAL,EXTENSION.

The SPRING,HELICAL,EXTENSION is a the manufacturer industrial component. Key specifications include material: STEEL UNS K08500 OVERALL, inside_diameter: 0.228 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL, spring_free_length: 0.180 INCHES NOMINAL IN, spring_free_outside_diameter: 0.350 INCHES NOMINAL IN, material_document_and_classification: ASTM A228 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-176-8170, 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
8519340
NSN: 5310-00-176-8170
NIINs: 001768170, 014295019
FSC: 5310 — Nuts and Washers
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL UNS K08500 OVERALL
inside_diameter0.228 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
spring_free_length0.180 INCHES NOMINAL IN
spring_free_outside_diameter0.350 INCHES NOMINAL IN
material_document_and_classificationASTM A228 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-176-8170
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8519340 · 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
•
WIDTH ACROSS FLATS: 0.812 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
NUT HEIGHT: 0.442 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.812 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
NUT HEIGHT0.442 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH13
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
AN335-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
63340183Reference document
Same NSN cross-reference
Reference document — Secondary reference
FFB571Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8519340?
8519340 is a SPRING,HELICAL,EXTENSION.
What parts can replace 8519340?
There are 3 known substitutes for 8519340: AN335-8, 63340183, FFB571. Substitute compatibility should be verified for your specific system.
What is the NSN for 8519340?
8519340 is cataloged in the U.S. Government catalog under NSN 5310-00-176-8170. 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.