Washer, Key5310-01-231-4004

NSN 5310-01-231-4004 · NIIN 012314004

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

Government record, cited

Also searched as 5310-01-231-4004 · 5310012314004 · NIIN 012314004 · 01-231-4004 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-231-3869 · 5310-01-231-4323 Washer, Special →

5310-01-231-4004 — Nuts and Washers

Features

Washer,key — FSC 5310
Surface Treatment Document and Classification: MIL-A-8625,TYPE II,CLASS 2,GRAY MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
External Prebent Key Length: 0.210 INCHES NOMINAL IN
Overall Distance Including Keys: 0.761 INCHES NOMINAL IN
Style Designator: KEY
Material Document and Classification: AMS4008,3003 H14,6507 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter: 0.551 INCHES NOMINAL IN
Material Thickness: 0.040 INCHES NOMINAL IN

Identification

NSN: 5310-01-231-4004
NIIN: 012314004
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,key, cataloged under National Stock Number 5310-01-231-4004, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-231-4004
Item Name	Washer,key
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Surface Treatment Document and Classification	MIL-A-8625,TYPE II,CLASS 2,GRAY MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
External Prebent Key Length	0.210 INCHES NOMINAL IN
Overall Distance Including Keys	0.761 INCHES NOMINAL IN
Style Designator	KEY
Material Document and Classification	AMS4008,3003 H14,6507 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter	0.551 INCHES NOMINAL IN
Material Thickness	0.040 INCHES NOMINAL IN
Surface Treatment	ANODIZE OVERALL
External Prebent Key Width	0.350 INCHES NOMINAL IN
Material	ALUMINUM ALLOY OVERALL
Hole Diameter	0.320 INCHES NOMINAL 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
1989653-1	3/9 Design control — primary 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 5310-01-231-4004?

NSN 5310-01-231-4004 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-231-4004?

Key specifications for 5310-01-231-4004: Surface Treatment Document and Classification: MIL-A-8625,TYPE II,CLASS 2,GRAY MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; External Prebent Key Length: 0.210 INCHES NOMINAL IN; Overall Distance Including Keys: 0.761 INCHES NOMINAL IN; Style Designator: KEY. 11 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-231-4004 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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