The Track Assembly, cataloged under National Stock Number 1720-01-019-4002, is classified within Federal Supply Class 1720 (Aircraft Launching Equipment) of the Aircraft Launch, Landing, and Ground Handling Equipment group. The manufacturer of record is The Entwistle Company Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1720-01-019-4002 |
| Primary Part Number | 517142-1R |
| Item Name | Track Assembly |
| FSC / FSG | 1720 / 17 — Aircraft Launching Equipment |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 517142-1R | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 517142-1R | 3/2 Design control — primary reference U.S. Government activity |
| 517142-1R | 5/9 Secondary reference Bay City Shovels, Inc |
| 517142-1R | 5/9 Secondary reference Hamill Manufacturing Company Dba Hamill Manufacturing Co |
| 517142-1R | 5/9 Secondary reference U.S. Government activity |
NSN 1720-01-019-4002 is a Track Assembly, manufactured by The Entwistle Company Llc, classified under FSC 1720, Aircraft Launching Equipment. Status: active.
NSN 1720-01-019-4002 has 1 manufacturer part number on file: 517142-1R (The Entwistle Company Llc).
Key specifications for 517142-1R: End Item Identification: CATAPULT MODEL C13-1. 0 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.
NSN 1720-01-019-4002 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.