The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-312-1837, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Raytheon E-Systems, Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-312-1837 |
| Primary Part Number | HP-V0081-001 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Raytheon E-Systems, Inc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HANDLE |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Operating Pressure | 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | AIR FIRST RESPONSE |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| HP-V0081-001 | Raytheon E-Systems, Inc (USA) |
| Reference | Meaning |
|---|---|
| HP-V0081 | 7/1 Vendor item drawing reference Raytheon E-Systems, Inc |
| SS-DSM4-F4-A | 3/9 Design control — primary reference Nupro Co |
NSN 4820-01-312-1837 is a Valve,diaphragm,stop, manufactured by Raytheon E-Systems, Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-312-1837 has 1 manufacturer part number on file: HP-V0081-001 (Raytheon E-Systems, Inc).
Key specifications for HP-V0081-001: Furnished Items and Quantity: 1 HANDLE; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END. 15 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.