PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

J4759BLSAdapter,socket Wrench

The Stanley Works Dba Stanley Proto · NSN 5120-01-591-8341 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-591-8341 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-591-8341. Primary manufacturer part number: J4759BLS.
Features
  • Adapter,socket Wrench — FSC 5120
  • Drive Surface Size: 0.250 INCHES NOMINAL BOTH ENDS IN
  • Drive End Shape: SQUARE FIRST END INTERNAL
  • Material: STEEL OVERALL
  • Surface Treatment: OXIDE OVERALL
  • Drive End Shape: SQUARE SECOND END EXTERNAL
  • 4 verified cross-references
  • Primary manufacturer: The Stanley Works Dba Stanley Proto
Applications
  • Applications requiring Steel Overall construction
General Description

The Adapter,socket Wrench, cataloged under National Stock Number 5120-01-591-8341, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The Stanley Works Dba Stanley Proto. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-591-8341
Primary Part NumberJ4759BLS
Item NameAdapter,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe Stanley Works Dba Stanley Proto
StatusACTIVE
Drive Surface Size0.250 INCHES NOMINAL BOTH ENDS IN
Drive End ShapeSQUARE FIRST END INTERNAL
MaterialSTEEL OVERALL
Surface TreatmentOXIDE OVERALL
Drive End ShapeSQUARE SECOND END EXTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5910-00-064-224419C372 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Sprague Electric Co World Hqs
5910-00-821-5215 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
5120-01-371-378781AD083-L INTERCHANGEABLE
Adapter,socket Wrench Extension
Giga, Inc.
Cross-Reference Index
Part NumberManufacturer
STP 4759BLS Kipper Tool Company Dba Kipper Management Inc (USA)
4759BLS The Stanley Works Dba Stanley Proto (USA)
J4759BLS PRIMARY The Stanley Works Dba Stanley Proto (USA)
19C372 W.w. Grainger, Inc. Div Government Sales Division (USA)
Related Parts
5910-00-064-2244INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
19C372
5910-00-821-5215INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
5120-01-371-3787INTERCHANGEABLE
ADAPTER,SOCKET WRENCH EXTENSION
81AD083-L

Frequently Asked Questions

What is NSN 5120-01-591-8341?

NSN 5120-01-591-8341 is a Adapter,socket Wrench, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-591-8341?

NSN 5120-01-591-8341 has 4 cross-referenced part numbers: STP 4759BLS (Kipper Tool Company Dba Kipper Management Inc), 4759BLS (The Stanley Works Dba Stanley Proto), J4759BLS (The Stanley Works Dba Stanley Proto), 19C372 (W.w. Grainger, Inc. Div Government Sales Division).

What NSN replaces 5120-01-591-8341?

There are 3 known substitutes for 5120-01-591-8341: 5910-00-064-2244, 5910-00-821-5215, 5120-01-371-3787. Verify interchangeability with system specifications before substitution.

What are the specifications of J4759BLS?

Key specifications for J4759BLS: Overall Length: 1.688 INCHES NOMINAL IN; Special Features: LOCKING TYPE; INCLUDES HEX KEY FOR SETSCREW; Drive Surface Size: 0.250 INCHES NOMINAL BOTH ENDS IN; Drive End Shape: SQUARE FIRST END INTERNAL. 7 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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