The Valve,check, cataloged under National Stock Number 4820-01-658-4574, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tyco Fire Products Lp. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Tyco Fire Products Lp (CAGE 03670); Nudraulix, Inc. Dba Dk-Lok Usa (CAGE 1B7P1) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-658-4574 |
| Primary Part Number | 440232 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tyco Fire Products Lp |
| 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 |
|---|---|
| 471598 REV 4 ITEM 19 | Tyco Fire Products Lp (USA) |
| RD-L-10 | Nudraulix, Inc. Dba Dk-Lok Usa (USA) |
| 440232 PRIMARY | Tyco Fire Products Lp (USA) |
| 440232 | Nudraulix, Inc. Dba Dk-Lok Usa (USA) |
NSN 4820-01-658-4574 is a Valve,check, manufactured by Tyco Fire Products Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-658-4574 has 4 manufacturer part numbers on file: 471598 REV 4 ITEM 19 (Tyco Fire Products Lp), RD-L-10 (Nudraulix, Inc. Dba Dk-Lok Usa), 440232 (Tyco Fire Products Lp), 440232 (Nudraulix, Inc. Dba Dk-Lok Usa).
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.