The Wrench,open End, cataloged under National Stock Number 5120-01-641-1849, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Martin Sprocket and Gear Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-641-1849 |
| Primary Part Number | 3710A |
| Item Name | Wrench,open End |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Martin Sprocket and Gear Inc |
| Status | ACTIVE |
| Large End Head Angle | 60.0 DEGREES NOMINAL |
| Small End Head Angle | 15.0 DEGREES NOMINAL |
| Wrenching Surface Size | 0.3438 INCHES NOMINAL FIRST END IN |
| Style Designator | DOUBLE HEAD OFFSET |
| Specification/standard Data | 05047-ASME B107.100/B107.39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 2 TYPE AND 2 CLASS |
| Wrenching Surface Shape | HEXAGON BOTH ENDS INTERNAL |
| Surface Treatment | CHROMIUM 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 |
|---|---|
| 3710A | Martin Sprocket and Gear Inc (USA) |
| Reference | Meaning |
|---|---|
| B107.39 TY2CL2 | 5/1 Secondary reference U.S. Government activity |
| B107.100 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| B107.39 | 5/1 Secondary reference The American Society of Mechanical Engineers |
NSN 5120-01-641-1849 is a Wrench,open End, manufactured by Martin Sprocket and Gear Inc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-641-1849 has 1 manufacturer part number on file: 3710A (Martin Sprocket and Gear Inc).
Key specifications for 3710A: Large End Head Angle: 60.0 DEGREES NOMINAL; Small End Head Angle: 15.0 DEGREES NOMINAL; Wrenching Surface Size: 0.3438 INCHES NOMINAL FIRST END IN; Style Designator: DOUBLE HEAD OFFSET. 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.