The Wrench,open End, cataloged under National Stock Number 5120-01-652-3685, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Martin Bros Toolmakers Inc. 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.
| Item Name | Wrench,open End |
| FSC / FSG | 5120 — Hand Tools, Nonedged, Nonpowered (FSG 51) |
| Manufacturers | Martin Bros Toolmakers Inc (CAGE 4U933) |
| Parameter | Value |
|---|---|
| NSN | 5120-01-652-3685 |
| Primary Part Number | 3721MM |
| Item Name | Wrench,open End |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Martin Bros Toolmakers Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 3721MM PRIMARY | Martin Bros Toolmakers Inc (USA) |
NSN 5120-01-652-3685 is a Wrench,open End, manufactured by Martin Bros Toolmakers Inc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-652-3685 has 1 manufacturer part number on file: 3721MM (Martin Bros Toolmakers Inc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-713-9170. Verify interchangeability with system specifications before substitution.
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.