Nut, Self-Locking, Internal Wrench5310-00-655-9940

NSN 5310-00-655-9940 · NIIN 006559940

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

Government record, cited

Also searched as 5310-00-655-9940 · 5310006559940 · NIIN 006559940 · 00-655-9940 · FSC 5310 Nuts and Washers

Nearby stock numbers ← 5310-00-655-9939 · 5310-00-655-9946 →

5310-00-655-9940 — Nuts and Washers

Features

Nut,self-Locking,internal Wrench — FSC 5310
Thread Series: UNF
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.312 INCHES IN
Nut Diameter: 0.593 INCHES NOMINAL IN
Width Between Flats: 0.440 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
Locking Feature: PREVAILING TORQUE WITH NONMETALLIC INSERT
Nut Height: 0.750 INCHES NOMINAL IN

Identification

NSN: 5310-00-655-9940
NIIN: 006559940
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives

General Description

The Nut,self-Locking,internal Wrench, cataloged under National Stock Number 5310-00-655-9940, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5310-00-655-9940
Item Name	Nut,self-Locking,internal Wrench
FSC / FSG	5310 / 53 — Nuts and Washers
Status	ACTIVE
Thread Series	UNF
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.312 INCHES IN
Nut Diameter	0.593 INCHES NOMINAL IN
Width Between Flats	0.440 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN
Locking Feature	PREVAILING TORQUE WITH NONMETALLIC INSERT
Nut Height	0.750 INCHES NOMINAL IN
Surface Treatment	CADMIUM OR ZINC OVERALL
Internal Drive Style	DOUBLE HEXAGON
Nut Style	INTERNAL WRENCHING
Thread Class	3B
Thread Quantity Per Inch	24
Material	STEEL 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
NAS443-5	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 5310-00-655-9940?

NSN 5310-00-655-9940 is a Nut,self-Locking,internal Wrench, classified under FSC 5310, Nuts and Washers. Status: active.

What are the specifications of 5310-00-655-9940?

Key specifications for 5310-00-655-9940: Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.312 INCHES IN; Nut Diameter: 0.593 INCHES NOMINAL IN. 13 specifications are documented in the U.S. Government catalog.

Is NSN 5310-00-655-9940 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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