The Wrench,box and Open End,combinat, cataloged under National Stock Number 5120-01-348-6837, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-348-6837 |
| Primary Part Number | J1221M |
| Item Name | Wrench,box and Open End,combinat |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | The Stanley Works Dba Stanley Proto |
| Status | ACTIVE |
| Wrenching Surface Size | 21.0 MILLIMETERS NOMINAL BOTH ENDS MM |
| Style Designator | OFFSET |
| Wrenching End Offset Angle | 15.0 DEGREES NOMINAL |
| Wrenching Surface Shape | 12 POINT SECOND END INTERNAL |
| Wrenching Surface Shape | OVAL FIRST END INTERNAL |
| Surface Treatment | CHROMIUM OVERALL |
| Head Angle | 15.0 DEGREES NOMINAL |
| 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 |
|---|---|
| J1221M PRIMARY | The Stanley Works Dba Stanley Proto (USA) |
| Reference | Meaning |
|---|---|
| 1221M | 5/9 Secondary reference The Stanley Works Dba Stanley Proto |
NSN 5120-01-348-6837 is a Wrench,box and Open End,combinat, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-348-6837 has 1 manufacturer part number on file: J1221M (The Stanley Works Dba Stanley Proto).
Key specifications for J1221M: Wrenching Surface Size: 21.0 MILLIMETERS NOMINAL BOTH ENDS MM; Style Designator: OFFSET; Overall Length: 270.0 MILLIMETERS NOMINAL MM; Wrenching End Offset Angle: 15.0 DEGREES NOMINAL. 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.