The Inserter,screw Thread Insert, cataloged under National Stock Number 5120-01-540-3985, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Long-Lok, Llc. Government technical data includes 2 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-540-3985 |
| Primary Part Number | TSDR048 |
| Item Name | Inserter,screw Thread Insert |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Long-Lok, Llc |
| Status | ACTIVE |
| Unit Type | MANDREL |
| Thread Size and Series/type Designator | 25-28 NF |
| 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 |
|---|---|
| TSDR048 PRIMARY | Long-Lok, Llc (USA) |
NSN 5120-01-540-3985 is a Inserter,screw Thread Insert, manufactured by Long-Lok, Llc, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-540-3985 has 1 manufacturer part number on file: TSDR048 (Long-Lok, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-671-2175. Verify interchangeability with system specifications before substitution.
Key specifications for TSDR048: Unit Type: MANDREL; Special Features: HEAT TREATED STEEL; 3A A; Thread Size and Series/type Designator: 25-28 NF. 2 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.