The Wrench,open End, cataloged under National Stock Number 5120-01-591-8377, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-591-8377 |
| Item Name | Wrench,open End |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Status | ACTIVE |
| Large End Head Angle | 15.0 DEGREES NOMINAL |
| Small End Head Angle | 15.0 DEGREES NOMINAL |
| Wrenching Surface Size | 1.375 INCHES NOMINAL FIRST END IN |
| Wrenching Surface Size | 1.438 INCHES NOMINAL SECOND END IN |
| Style Designator | DOUBLE HEAD |
| Wrenching Surface Shape | OVAL BOTH ENDS INTERNAL |
| 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 |
| Reference | Meaning |
|---|---|
| STP 3060 | 5/9 Secondary reference Kipper Tool Company Dba Kipper Management Inc |
| J3060 | 3/1 Design control — primary reference The Stanley Works Dba Stanley Proto |
| 3060 | 5/9 Secondary reference The Stanley Works Dba Stanley Proto |
NSN 5120-01-591-8377 is a Wrench,open End, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5120-01-652-0328. Verify interchangeability with system specifications before substitution.
Key specifications for 5120-01-591-8377: Large End Head Angle: 15.0 DEGREES NOMINAL; Small End Head Angle: 15.0 DEGREES NOMINAL; Wrenching Surface Size: 1.375 INCHES NOMINAL FIRST END IN; Wrenching Surface Size: 1.438 INCHES NOMINAL SECOND END IN. 8 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.