Screwdriver Attachment, Socket Wr5120-01-656-1964

NSN 5120-01-656-1964 · NIIN 016561964 · Part number J4990-5MST

The Stanley Works Dba Stanley Proto · FSC 5120 — Hand Tools, Nonedged, Nonpowered · FSG 51 — Hand Tools · CAGE 1CV05

Government record, cited

NSN 5120-01-656-1964 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-656-1964. Manufacturer of record part number: J4990-5MST.

Also searched as 5120-01-656-1964 · 5120016561964 · NIIN 016561964 · 01-656-1964 · FSC 5120 Hand Tools, Nonedged, Nonpowered · CAGE 1CV05 · J4990-5MST

Nearby stock numbers ← 5120-01-656-1963 Wrench, Torque · 5120-01-656-1965 Wrench, Box and Open End, Combinat →

Features

Screwdriver Attachment,socket Wr — FSC 5120
Wrenching Surface Size: 5.0 MILLIMETERS NOMINAL SINGLE END MM
Style Designator: HEXAGON
Blade Length: 0.688 INCHES NOMINAL IN
Features Provided: MANUAL TOOL
Wrenching Surface Shape: HEXAGON SINGLE END EXTERNAL
Surface Treatment: CHROMIUM DRIVE SURFACE
Surface Treatment: OXIDE BIT

Identification

NSN: 5120-01-656-1964
NIIN: 016561964
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
FSG: 51 — Hand Tools
Primary part number: J4990-5MST
Manufacturer: The Stanley Works Dba Stanley Proto

General Description

The Screwdriver Attachment,socket Wr, cataloged under National Stock Number 5120-01-656-1964, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5120-01-656-1964
Primary Part Number	J4990-5MST
Item Name	Screwdriver Attachment,socket Wr
FSC / FSG	5120 / 51 — Hand Tools, Nonedged, Nonpowered
Manufacturer	The Stanley Works Dba Stanley Proto
Status	ACTIVE
Wrenching Surface Size	5.0 MILLIMETERS NOMINAL SINGLE END MM
Style Designator	HEXAGON
Blade Length	0.688 INCHES NOMINAL IN
Features Provided	MANUAL TOOL
Wrenching Surface Shape	HEXAGON SINGLE END EXTERNAL
Surface Treatment	CHROMIUM DRIVE SURFACE
Surface Treatment	OXIDE BIT
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

Part Number	Manufacturer
J4990-5MST PRIMARY	The Stanley Works Dba Stanley Proto (USA)

No interchangeability data on file.

Other items in FSC 5120 — Hand Tools, Nonedged, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5120-00-001-2642

ADAPTER,TORQUE WRENCH

5120-00-001-2644

ADAPTER,TORQUE WRENCH

5120-00-001-2650

INSERTER,SEAL

5120-00-001-2651

5120-00-001-2651 · Item name not on file

5120-00-001-2652

INSTALLING TOOL,SHAFT

5120-00-001-2653

REMOVER,PREFORMED PACKING

5120-00-001-2654

REMOVER,PREFORMED PACKING

5120-00-001-2655

SOCKET,WRENCH,FACE SPANNER

Frequently Asked Questions

What is NSN 5120-01-656-1964?

NSN 5120-01-656-1964 is a Screwdriver Attachment,socket Wr, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.

What part numbers are listed for NSN 5120-01-656-1964?

NSN 5120-01-656-1964 has 1 manufacturer part number on file: J4990-5MST (The Stanley Works Dba Stanley Proto).

What are the specifications of J4990-5MST?

Key specifications for J4990-5MST: Wrenching Surface Size: 5.0 MILLIMETERS NOMINAL SINGLE END MM; Style Designator: HEXAGON; Overall Length: 1.781 INCHES NOMINAL IN; Blade Length: 0.688 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.

Is NSN 5120-01-656-1964 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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