The Wrench,box, cataloged under National Stock Number 5120-00-375-7993, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-00-375-7993 |
| Item Name | Wrench,box |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Status | ACTIVE |
| Large End Head Thickness | 0.688 INCHES NOMINAL IN |
| Small End Head Thickness | 0.188 INCHES NOMINAL IN |
| Large End Outside Diameter | 1.000 INCHES NOMINAL IN |
| Wrenching Surface Size | 0.250 INCHES NOMINAL FIRST END IN |
| Wrenching Surface Size | 0.375 INCHES NOMINAL SECOND END IN |
| Small End Outside Diameter | 0.750 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-20166,GRADE M MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Wrenching Surface Shape | SQUARE FIRST END INTERNAL |
| Wrenching Surface Shape | HEXAGON SECOND END INTERNAL |
| Special Markings | 1/4 IN. AND 3/8 IN.,T.S. VALVE,VENT IN |
| Material | STEEL COMP 1022 OVERALL |
| Offset Height | 0.500 INCHES NOMINAL IN |
| 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 |
|---|---|
| 2100-935087PC16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5120-00-375-7993 is a Wrench,box, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
Key specifications for 5120-00-375-7993: Large End Head Thickness: 0.688 INCHES NOMINAL IN; Small End Head Thickness: 0.188 INCHES NOMINAL IN; Large End Outside Diameter: 1.000 INCHES NOMINAL IN; Wrenching Surface Size: 0.250 INCHES NOMINAL FIRST END IN. 12 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.