The Valve,pneumatic Tank, cataloged under National Stock Number 4820-01-150-1983, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-150-1983 |
| Primary Part Number | SS-4P-4M |
| Item Name | Valve,pneumatic Tank |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Series Designator | BSP.PL EXT |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 600.0 FAHRENHEIT DEGF |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 1 |
| First End Connection Type | THREADED EXTERNAL PIPE |
| Media for Which Designed | WATER-OIL-GAS |
| First End Nominal Pipe Size Accommodated | 0.250 INCHES IN |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING BODY |
| First End Nominal Thread Size | 0.250 INCHES IN |
| 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 |
|---|---|
| SS-4P-4M PRIMARY | Swagelok Co (USA) |
| 44624-662-00-1 | Bae Systems Maritime Services Limited (GBR) |
| Reference | Meaning |
|---|---|
| 44624-662-00-1 | 5/9 Secondary reference British Aerospace Defence Systems Ltd T/a Bae Systems |
NSN 4820-01-150-1983 is a Valve,pneumatic Tank, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-150-1983 has 2 manufacturer part numbers on file: SS-4P-4M (Swagelok Co), 44624-662-00-1 (Bae Systems Maritime Services Limited).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-232-5431, 4820-01-330-4407. Verify interchangeability with system specifications before substitution.
Key specifications for SS-4P-4M: Flow Control Device: POPPET; First End Thread Series Designator: BSP.PL EXT; First End Thread Direction: RIGHT-HAND; Temp Rating: 600.0 FAHRENHEIT DEGF. 13 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.