The Valve,safety Relief, cataloged under National Stock Number 4820-00-477-3333, 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 Pump Division. Government technical data includes 21 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-477-3333 |
| Primary Part Number | M16-18149 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Connection Style | GASKET SEAL(BOSS) SECOND END |
| Nominal Length | 3.500 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Bolt Hole Nominal Diameter | 0.375 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Outside Diameter | 1.250 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| Surface Treatment | PAINT LOCATION NOT OTHERWISE SPECIFIED |
| Nominal Width | 2.000 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.375 INCHES FIRST END IN |
| Thread Class | 2B SECOND END |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF SECOND END |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 1.188 INCHES FIRST END 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 |
|---|---|
| M16-18149 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
NSN 4820-00-477-3333 is a Valve,safety Relief, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-477-3333 has 1 manufacturer part number on file: M16-18149 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division).
Key specifications for M16-18149: Flow Control Device: PISTON; Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Connection Style: GASKET SEAL(BOSS) SECOND END. 21 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.