The Key,socket Head Screw, cataloged under National Stock Number 5120-01-398-7658, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Sears, Roebuck and Co. Dba Sears Div Sears Commercial. Government technical data includes 6 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. 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 | 5120-01-398-7658 |
| Primary Part Number | 9-28137 |
| Item Name | Key,socket Head Screw |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Sears, Roebuck and Co. Dba Sears Div Sears Commercial |
| Status | ACTIVE |
| Wrenching Surface Size | 0.188 INCHES NOMINAL BOTH ENDS IN |
| Style Designator | L-HANDLE |
| Features Provided | SHORT SERIES |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 9-28137 PRIMARY | Sears, Roebuck and Co. Dba Sears Div Sears Commercial (USA) |
NSN 5120-01-398-7658 is a Key,socket Head Screw, manufactured by Sears, Roebuck and Co. Dba Sears Div Sears Commercial, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-398-7658 has 1 manufacturer part number on file: 9-28137 (Sears, Roebuck and Co. Dba Sears Div Sears Commercial).
2 possible matches (shared part number, not a government interchangeability claim): 2920-01-420-3903, 5945-01-533-8873. Verify interchangeability with system specifications before substitution.
Key specifications for 9-28137: Wrenching Surface Size: 0.188 INCHES NOMINAL BOTH ENDS IN; Style Designator: L-HANDLE; Features Provided: SHORT SERIES; Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL. 6 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.