The Regulator,compressed Gas, cataloged under National Stock Number 4820-01-520-3557, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Regulator,compressed Gas |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | The Entwistle Company Llc (CAGE 20722) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-520-3557 |
| Primary Part Number | KT-4908-1 |
| Item Name | Regulator,compressed Gas |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| KT-4908-1 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| KT-4908-1 | 3/9 Design control — primary reference Entwistle Co the Kenett Hydraulic Systems Div |
NSN 4820-01-520-3557 is a Regulator,compressed Gas, manufactured by The Entwistle Company Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-520-3557 has 1 manufacturer part number on file: KT-4908-1 (The Entwistle Company Llc).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-534-1132. 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.