The Wrench,open End, cataloged under National Stock Number 5120-01-652-3677, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Martin-Fairmount Fairmount Tool and Forging Div of Martin Sprocket and Gear Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-652-3677 |
| Primary Part Number | 3720MM |
| Item Name | Wrench,open End |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Martin-Fairmount Fairmount Tool and Forging Div of Martin Sprocket and Gear Inc |
| Status | ACTIVE |
| Large End Head Angle | 60.0 DEGREES NOMINAL |
| Large End Head Thickness | 7.1 MILLIMETERS NOMINAL MM |
| Small End Head Thickness | 7.1 MILLIMETERS NOMINAL MM |
| Small End Head Angle | 15.0 DEGREES NOMINAL |
| Wrenching Surface Size | 20.0 MILLIMETERS NOMINAL BOTH ENDS MM |
| Style Designator | THIN DOUBLE HEAD |
| Wrenching Surface Shape | OVAL BOTH ENDS INTERNAL |
| 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 |
|---|---|
| 3720MM PRIMARY | Martin-Fairmount Fairmount Tool and Forging Div of Martin Sprocket and Gear Inc (USA) |
NSN 5120-01-652-3677 is a Wrench,open End, manufactured by Martin-Fairmount Fairmount Tool and Forging Div of Martin Sprocket and Gear Inc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-652-3677 has 1 manufacturer part number on file: 3720MM (Martin-Fairmount Fairmount Tool and Forging Div of Martin Sprocket and Gear Inc).
Key specifications for 3720MM: Large End Head Angle: 60.0 DEGREES NOMINAL; Large End Head Thickness: 7.1 MILLIMETERS NOMINAL MM; Small End Head Thickness: 7.1 MILLIMETERS NOMINAL MM; Small End Head 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.