The Valve,linear,directional Control, cataloged under National Stock Number 4820-01-451-4664, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Prince Manufacturing Corporation. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-4664 |
| Primary Part Number | RD-2555-T4-ESA1 |
| Item Name | Valve,linear,directional Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Prince Manufacturing Corporation |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HANDLE AND 1 RELIEF VALVE |
| Operating Pressure and Type | 1500.0 POUNDS PER SQUARE INCH (PSI) HYDRAULIC OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Connection Type | THREADED INTERNAL PIPE |
| End Connection Quantity | 3 |
| Nominal Thread Size | 0.500 INCHES IN |
| Spool Quantity | 1 |
| Body Material | IRON CAST |
| Thread Series Designator | NPTF |
| Valve Discharge Flow Rate | 12.0 GALLONS PER MINUTE |
| Valve Operation Method | MANUAL |
| Flow Pattern Quantity | 4 |
| Spool Position Quantity | 3 |
| 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 |
|---|---|
| RD-2555-T4-ESA1 | Hydron Inc (USA) |
| RD-2555-T4-ESA1 PRIMARY | Prince Manufacturing Corporation (USA) |
| RD-2555-T4-ESA1 | B. W. Rogers Company (USA) |
NSN 4820-01-451-4664 is a Valve,linear,directional Control, manufactured by Prince Manufacturing Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-4664 has 3 manufacturer part numbers on file: RD-2555-T4-ESA1 (Hydron Inc), RD-2555-T4-ESA1 (Prince Manufacturing Corporation), RD-2555-T4-ESA1 (B. W. Rogers Company).
Key specifications for RD-2555-T4-ESA1: Furnished Items and Quantity: 1 HANDLE AND 1 RELIEF VALVE; Operating Pressure and Type: 1500.0 POUNDS PER SQUARE INCH (PSI) HYDRAULIC OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS; Connection Type: THREADED INTERNAL PIPE; End Connection Quantity: 3. 12 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.