The Wrench,box, cataloged under National Stock Number 5120-00-385-8034, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. 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 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 | 5120-00-385-8034 |
| Primary Part Number | 8407401 |
| Item Name | Wrench,box |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Drive Surface Size | 0.506 INCHES MINIMUM AND 0.512 INCHES MAXIMUM SINGLE END IN |
| Wrenching Surface Size | 0.750 INCHES MINIMUM AND 0.754 INCHES MAXIMUM FIRST END IN |
| Style Designator | STRAIGHT SINGLE HEAD |
| Material Document and Classification | QQ-S-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Wrenching Surface Shape | HEXAGON SINGLE END INTERNAL |
| Drive End Shape | SQUARE SINGLE END INTERNAL |
| Surface Treatment | PHOSPHATE 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 |
|---|---|
| 8407401 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 5120-00-385-8034 is a Wrench,box, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-00-385-8034 has 1 manufacturer part number on file: 8407401 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
1 possible match (shared part number, not a government interchangeability claim): 6135-01-481-9031. Verify interchangeability with system specifications before substitution.
Key specifications for 8407401: Drive Surface Size: 0.506 INCHES MINIMUM AND 0.512 INCHES MAXIMUM SINGLE END IN; Wrenching Surface Size: 0.750 INCHES MINIMUM AND 0.754 INCHES MAXIMUM FIRST END IN; Style Designator: STRAIGHT SINGLE HEAD; Material Document and Classification: QQ-S-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.