The Valve,vacuum Regulating, cataloged under National Stock Number 4820-01-665-3581, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Wl Gore & Associates Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-665-3581 |
| Primary Part Number | PMF200444 |
| Item Name | Valve,vacuum Regulating |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Wl Gore & Associates Inc |
| Status | ACTIVE |
| Flow Control Device | DISK, CIRCULAR |
| First End Width Across Flats | 20.0 MILLIMETERS NOMINAL MM |
| Temp Rating | 125.0 CELSIUS DEGC |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Flange Thickness | 14.15 MILLIMETERS NOMINAL MM |
| First End Style Designator | SWIVEL NUT, FLARE |
| Body Material | STEEL |
| First End Flange Shape Style | HEXAGON W/O BOLT HOLES |
| 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 |
|---|---|
| PMF200444 | W. L. Gore & Associates Gmbh (DEU) |
| C0001401-12 | Saab Aktiebolag Div Radar Solutions (SWE) |
| PMF200444 | Gore W L and Associates Inc Industrial Sealant Group (USA) |
| 3626.7371.00 | Rohde & Schwarz Gmbh & Co. Kommanditgesellschaft Dba R & S (DEU) |
| PMF200444 PRIMARY | Wl Gore & Associates Inc (USA) |
| 2250010015AA | Thales Deutschland Gmbh Div Customer Services (DEU) |
| 3304102 | Bae Systems Australia Defence Pty Ltd (AUS) |
| PMF200444 | W L Gore Et Associes (FRA) |
| Reference | Meaning |
|---|---|
| 10440507 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| M121.5 320 0514SP | 5/9 Secondary reference Aeronautical & General Instruments Limited |
| M121.5 320 0514SP | C/1 Advisory reference — outside the item-of-supply concept Trident Maritime Systems Uk Limited |
NSN 4820-01-665-3581 is a Valve,vacuum Regulating, manufactured by Wl Gore & Associates Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-665-3581 has 8 manufacturer part numbers on file: PMF200444 (W. L. Gore & Associates Gmbh), C0001401-12 (Saab Aktiebolag Div Radar Solutions), PMF200444 (Gore W L and Associates Inc Industrial Sealant Group), 3626.7371.00 (Rohde & Schwarz Gmbh & Co. Kommanditgesellschaft Dba R & S), PMF200444 (Wl Gore & Associates Inc) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 5340-01-665-8073. Verify interchangeability with system specifications before substitution.
Key specifications for PMF200444: Flow Control Device: DISK, CIRCULAR; First End Width Across Flats: 20.0 MILLIMETERS NOMINAL MM; Temp Rating: 125.0 CELSIUS DEGC; Body Style: SINGLE CONNECTION, STRAIGHT FLOW. 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.