Nut, Self-Locking, Extended Washer5310-01-623-7904

NSN 5310-01-623-7904 · NIIN 016237904

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

Government record, cited

Also searched as 5310-01-623-7904 · 5310016237904 · NIIN 016237904 · 01-623-7904 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-01-623-7888 Washer, Flat · 5310-01-623-7941 Washer, Flat →

5310-01-623-7904 — Nuts and Washers

Features

Nut,self-Locking,extended Washer — FSC 5310
Washer Outside Diameter: 1.221 INCHES MAXIMUM IN
Width Across Flats: 1.059 INCHES MINIMUM IN
Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)
Washer Thickness: 0.094 INCHES NOMINAL IN
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.750 INCHES IN
Locking Feature: PREVAILING TORQUE ALL METAL DESIGN

Identification

NSN: 5310-01-623-7904
NIIN: 016237904
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-623-7904, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5310-01-623-7904
Item Name	Nut,self-Locking,extended Washer
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Washer Outside Diameter	1.221 INCHES MAXIMUM IN
Width Across Flats	1.059 INCHES MINIMUM IN
Thread Series	UNIFIED NATIONAL JOINT FINE (UNJF)
Washer Thickness	0.094 INCHES NOMINAL IN
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.750 INCHES IN
Locking Feature	PREVAILING TORQUE ALL METAL DESIGN
Surface Treatment	CADMIUM OVERALL
Nut Style	DOUBLE HEXAGON
Thread Class	3B
Thread Quantity Per Inch	16
Material	IRON ALLOY 660 OR NICKEL ALLOY 718 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

Cross-Reference Index

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

Reference documents

Reference	Meaning
NAS1805-12L	3/2 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 5310-01-623-7904?

NSN 5310-01-623-7904 is a Nut,self-Locking,extended Washer, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-01-623-7904?

Key specifications for 5310-01-623-7904: Overall Height: 0.750 INCHES MAXIMUM IN; Washer Outside Diameter: 1.221 INCHES MAXIMUM IN; Width Across Flats: 1.059 INCHES MINIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 12 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-623-7904 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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