The Wrench,box, cataloged under National Stock Number 5120-01-348-2991, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-348-2991 |
| Primary Part Number | JUSN347 |
| Item Name | Wrench,box |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | The Stanley Works Dba Stanley Proto |
| Status | ACTIVE |
| Wrenching Surface Size | 2.938 INCHES NOMINAL SINGLE END IN |
| Style Designator | SLUGGING |
| Outside Diameter | 4.630 INCHES NOMINAL IN |
| Specification/standard Data | 05047-ASME B107.410 CAT 59 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 2 TYPE |
| Wrenching Surface Shape | 12 POINT SINGLE END INTERNAL |
| Surface Treatment | OXIDE OVERALL |
| Material | STEEL OVERALL |
| Head Thickness | 1.880 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 |
| Part Number | Manufacturer |
|---|---|
| JUSN347 PRIMARY | The Stanley Works Dba Stanley Proto (USA) |
| Reference | Meaning |
|---|---|
| B107.410 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| B107.410 CAT 59 TY2 | 5/1 Secondary reference U.S. Government activity |
| USN347 | 5/9 Secondary reference The Stanley Works Dba Stanley Proto |
NSN 5120-01-348-2991 is a Wrench,box, manufactured by The Stanley Works Dba Stanley Proto, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-348-2991 has 1 manufacturer part number on file: JUSN347 (The Stanley Works Dba Stanley Proto).
2 possible matches (shared part number, not a government interchangeability claim): 5120-01-348-8817, 5120-01-351-3465. Verify interchangeability with system specifications before substitution.
Key specifications for JUSN347: Wrenching Surface Size: 2.938 INCHES NOMINAL SINGLE END IN; Style Designator: SLUGGING; Overall Length: 15.750 INCHES NOMINAL IN; Outside Diameter: 4.630 INCHES NOMINAL IN. 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.