The Valve,rotary,selector, cataloged under National Stock Number 4820-01-338-9418, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-338-9418 |
| Primary Part Number | 8091-3/4HS2 |
| Item Name | Valve,rotary,selector |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Flow Control Device | PORTED ROTOR |
| Maximum Operating Temp and Media for Which Designed | 160.0 FAHRENHEIT OIL, HYDRAULIC DEGF |
| Operating Pressure and Type | 2000.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED AND 3000.0 POUNDS PER SQUARE INCH (PSI) HYDRAULIC OIL MAXIMUM REQUIRED LBS |
| Connection Type | THREADED INTERNAL PIPE |
| Valve Size | 0.750 INCHES IN |
| Flow Type | THREE-WAY |
| Nominal Thread Size | 0.750 INCHES IN |
| Body Material | STEEL |
| Mounting Facility | INLINE |
| Connection Location | SIDE |
| Connection Quantity | 3 |
| Thread Series Designator | NPT |
| 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 |
|---|---|
| 8091-3/4HS2 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| Reference | Meaning |
|---|---|
| 8091-3/4HS2 | 5/9 Secondary reference Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
| 1-3172-88 ASSY 8091E-3/4HS2 | 3/9 Design control — primary reference U.S. Government activity |
| 1-3172-88 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-338-9418 is a Valve,rotary,selector, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-338-9418 has 1 manufacturer part number on file: 8091-3/4HS2 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-551-4331, 4820-01-585-4010. Verify interchangeability with system specifications before substitution.
Key specifications for 8091-3/4HS2: Flow Control Device: PORTED ROTOR; Maximum Operating Temp and Media for Which Designed: 160.0 FAHRENHEIT OIL, HYDRAULIC DEGF; Operating Pressure and Type: 2000.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED AND 3000.0 POUNDS PER SQUARE INCH (PSI) HYDRAULIC OIL MAXIMUM REQUIRED LBS; Connection Type: THREADED INTERNAL PIPE. 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.