The Extension,socket Wrench, cataloged under National Stock Number 5120-01-591-8389, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-591-8389 |
| Primary Part Number | J4759L |
| Item Name | Extension,socket Wrench |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | The Stanley Works Dba Stanley Proto |
| Status | ACTIVE |
| Drive Surface Size | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Style Designator | RIGID |
| Features Provided | MANUAL TOOL |
| Specification/standard Data | 0U583-SAE AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 2 TYPE AND 2 CLASS |
| Drive End Shape | SQUARE FIRST END INTERNAL |
| Drive End Shape | SQUARE SECOND END EXTERNAL |
| Surface Treatment | CHROMIUM OVERALL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| J4759L | The Stanley Works Dba Stanley Proto (USA) |
| 5HL98 | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| Reference | Meaning |
|---|---|
| 4759L | 5/9 Secondary reference The Stanley Works Dba Stanley Proto |
| AS4283 | 5/9 Secondary reference U.S. Government activity |
| STP 4759L | 5/9 Secondary reference Kipper Tool Company Dba Kipper Management Inc |
| AS4283 TY2CL2 | 5/1 Secondary reference U.S. Government activity |
| AS4283 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5120-01-591-8389 is a Extension,socket Wrench, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-591-8389 has 2 manufacturer part numbers on file: J4759L (The Stanley Works Dba Stanley Proto), 5HL98 (W.w. Grainger, Inc. Div Government Sales Division).
Key specifications for J4759L: Drive Surface Size: 0.250 INCHES NOMINAL BOTH ENDS IN; Style Designator: RIGID; Overall Length: 2.000 INCHES NOMINAL IN; Features Provided: MANUAL TOOL. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.