The Extension,socket Wrench, cataloged under National Stock Number 5120-01-424-6397, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Snap on Uk Holdings Ltd T/a Snap on Tools. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Extension,socket Wrench |
| FSC / FSG | 5120 — Hand Tools, Nonedged, Nonpowered (FSG 51) |
| Manufacturers | Snap on Uk Holdings Ltd T/a Snap on Tools (CAGE K5773) |
| Parameter | Value |
|---|---|
| NSN | 5120-01-424-6397 |
| Primary Part Number | TMXK240 |
| Item Name | Extension,socket Wrench |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Snap on Uk Holdings Ltd T/a Snap on Tools |
| 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 |
|---|---|
| TMXK240 | Snap on Uk Holdings Ltd T/a Snap on Tools (GBR) |
| Reference | Meaning |
|---|---|
| TMX K240 | 3/9 Design control — primary reference Snap-on Tools Corp |
| TMX240 | 5/9 Secondary reference Snap on Uk Holdings Ltd T/a Snap on Tools |
NSN 5120-01-424-6397 is a Extension,socket Wrench, manufactured by Snap on Uk Holdings Ltd T/a Snap on Tools, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-424-6397 has 1 manufacturer part number on file: TMXK240 (Snap on Uk Holdings Ltd T/a Snap on Tools).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-437-1915. 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.