The Valve,regulating,system Pressure, cataloged under National Stock Number 4820-01-435-0291, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is F.c.kingston Co. Dba Storm Manufacturing. Government technical data includes 8 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 | 4820-01-435-0291 |
| Primary Part Number | 621-4-4 |
| Item Name | Valve,regulating,system Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | F.c.kingston Co. Dba Storm Manufacturing |
| Status | ACTIVE |
| First End Thread Direction | RIGHT-HAND |
| Body Style | ANGLE |
| First End Style Designator | GASKET SEAL |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED EXTERNAL PIPE |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | AIR |
| Thread Size and Series/type Designator | 1/2-14 NPT FIRST END |
| 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 |
|---|---|
| 621-4-4 PRIMARY | F.c.kingston Co. Dba Storm Manufacturing (USA) |
NSN 4820-01-435-0291 is a Valve,regulating,system Pressure, manufactured by F.c.kingston Co. Dba Storm Manufacturing, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-435-0291 has 1 manufacturer part number on file: 621-4-4 (F.c.kingston Co. Dba Storm Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-649-1143. Verify interchangeability with system specifications before substitution.
Key specifications for 621-4-4: First End Thread Direction: RIGHT-HAND; Body Style: ANGLE; First End Style Designator: GASKET SEAL; End Connection Quantity: 2. 8 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.