The Key,socket Head Screw, cataloged under National Stock Number 5120-01-644-3460, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 — Hand Tools, Nonedged, Nonpowered (FSG 51) |
| Manufacturers | The American Society of Mechanical Engineers (CAGE 05047); Eklind Tool Co (CAGE 05253) |
| Parameter | Value |
|---|---|
| NSN | 5120-01-644-3460 |
| Primary Part Number | B18.3.2M |
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Short Arm Length | 0.690 INCHES NOMINAL IN |
| Wrenching Surface Size | 2.5 MILLIMETERS NOMINAL BOTH ENDS MM |
| Style Designator | L-HANDLE |
| Features Provided | SHORT SERIES |
| Long Arm Length | 2.150 INCHES NOMINAL IN |
| Wrenching Surface Shape | HEXAGON BOTH ENDS EXTERNAL |
| Surface Treatment | OXIDE 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 |
NSN 5120-01-644-3460 is a Key,socket Head Screw, manufactured by The American Society of Mechanical Engineers, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-644-3460 has 2 manufacturer part numbers on file: B18.3.2M (The American Society of Mechanical Engineers), 15505 (Eklind Tool Co).
Key specifications for B18.3.2M: Short Arm Length: 0.690 INCHES NOMINAL IN; Wrenching Surface Size: 2.5 MILLIMETERS NOMINAL BOTH ENDS MM; Style Designator: L-HANDLE; Features Provided: SHORT SERIES. 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.