Washer, Spring Tension5310-01-321-4785

NSN 5310-01-321-4785 · NIIN 013214785

FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives

Government record, cited

Also searched as 5310-01-321-4785 · 5310013214785 · NIIN 013214785 · 01-321-4785 · FSC 5310 Nuts and Washers · M12133/4-176 · MIL-W-12133/4

Nearby stock numbers ← 5310-01-321-4332 Washer, Concave · 5310-01-321-4807 Nut, Plain, Hexagon →

5310-01-321-4785 — Nuts and Washers

Features

Washer,spring Tension — FSC 5310
Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Material Document and Classification: MIL-S-5059,1/2 H MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter: 0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
Material Thickness: 0.009 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN
Surface Treatment: PASSIVATE OVERALL
Material: STEEL COMP 302 OVERALL
Hole Diameter: 0.176 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN

Identification

NSN: 5310-01-321-4785
NIIN: 013214785
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,spring Tension, cataloged under National Stock Number 5310-01-321-4785, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-321-4785
Item Name	Washer,spring Tension
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Surface Treatment Document and Classification	ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Material Document and Classification	MIL-S-5059,1/2 H MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter	0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN
Material Thickness	0.009 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN
Surface Treatment	PASSIVATE OVERALL
Material	STEEL COMP 302 OVERALL
Hole Diameter	0.176 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
M12133/4-176	2/2 Government specification standardization U.S. Government activity
MIL-W-12133/4	4/1 Identification reference U.S. Government activity

No interchangeability data on file.

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

5310-00-000-0040 · Item name not on file

5310-00-000-0077

NUT,PLAIN,ROUND

5310-00-000-0079

WASHER,FLAT

5310-00-000-0079

WASHER,FLAT

5310-00-000-1146

5310-00-000-1146 · Item name not on file

5310-00-000-3815

5310-00-000-3815 · Item name not on file

5310-00-000-4532

5310-00-000-4532 · Item name not on file

5310-00-000-4540

5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-321-4785?

NSN 5310-01-321-4785 is a Washer,spring Tension, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-321-4785?

Key specifications for 5310-01-321-4785: Overall Height: 0.027 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: MIL-S-5059,1/2 H MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.340 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-321-4785 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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