Washer, Key5310-01-399-1972

NSN 5310-01-399-1972 · NIIN 013991972

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

Government record, cited

Also searched as 5310-01-399-1972 · 5310013991972 · NIIN 013991972 · 01-399-1972 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-399-1696 Washer, Flat · 5310-01-399-1980 Washer, Flat →

5310-01-399-1972 — Nuts and Washers

Features

Washer,key — FSC 5310
Internal Straight Key Width: 0.250 INCHES NOMINAL IN
Hardness Rating: 15.0 ROCKWELL N NOMINAL
Material Thickness: 0.1425 INCHES MINIMUM AND 0.1565 INCHES MAXIMUM IN
Material: STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1020 OVERALL

Identification

NSN: 5310-01-399-1972
NIIN: 013991972
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Washer,key, cataloged under National Stock Number 5310-01-399-1972, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-399-1972
Item Name	Washer,key
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Internal Straight Key Width	0.250 INCHES NOMINAL IN
Hardness Rating	15.0 ROCKWELL N NOMINAL
Material Thickness	0.1425 INCHES MINIMUM AND 0.1565 INCHES MAXIMUM IN
Material	STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1020 OVERALL

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

⇄ Related Items 1

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5340-01-717-4722102251 POSSIBLE MATCH

PAD,CUSHIONING

Possible match (shared part number)Naval Surface Warfare Center Dahlgren Div

Cross-Reference Index

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

Reference documents

Reference	Meaning
102251	3/2 Design control — primary reference U.S. Government activity

Related Parts

5340-01-717-4722POSSIBLE MATCH

PAD,CUSHIONING

102251

Frequently Asked Questions

What is NSN 5310-01-399-1972?

NSN 5310-01-399-1972 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.

What NSN replaces 5310-01-399-1972?

1 possible match (shared part number, not a government interchangeability claim): 5340-01-717-4722. Verify interchangeability with system specifications before substitution.

What are the specifications of 5310-01-399-1972?

Key specifications for 5310-01-399-1972: Internal Straight Key Width: 0.250 INCHES NOMINAL IN; Hardness Rating: 15.0 ROCKWELL N NOMINAL; Material Thickness: 0.1425 INCHES MINIMUM AND 0.1565 INCHES MAXIMUM IN; Material: STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1020 OVERALL. 4 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-399-1972 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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