The Valve,safety Relief, cataloged under National Stock Number 4820-00-455-1097, 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 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-455-1097 |
| Primary Part Number | 513-50053 |
| 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 | POPPETPOPPET |
| Furnished Items and Quantity | 1 DEFLECTOR CAP |
| Connection Style | FLARED (TUBE) ALL ENDSFLARED (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDSTHREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU W/BAFFLE |
| Material Document and Classification | FED STD 66 FED SPEC 1ST MATERIAL RESPONSE STEM |
| Material Document and Classification | FED STD 66 FED SPEC 1ST MATERIAL RESPONSE STEMFED STD 66 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | FED STD 66 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICEFED STD 66 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDSRIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.312 INCHES ALL ENDS1.312 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Maximum Operating Temp | -40.0 FAHRENHEIT FIRST RESPONSE-40.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 280.0 FAHRENHEIT SECOND RESPONSE280.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Disk Loading Method | SPRINGSPRING |
| Media for Which Designed | HELIUM FIFTH RESPONSE |
| Media for Which Designed | ALCOHOL, ETHYL SECOND RESPONSEAIR FIRST RESPONSE |
| Media for Which Designed | AMMONIA, GASEOUS THIRD RESPONSEALCOHOL, ETHYL SECOND RESPONSE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON FOURTH RESPONSEAMMONIA, GASEOUS THIRD RESPONSE |
| Media for Which Designed | HELIUM FIFTH RESPONSEFUEL/OIL, HYDROCARBON FOURTH RESPONSE |
| Thread Class | 3A ALL ENDS3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS12 ALL ENDS |
| Material | STEEL COMP 303 STEM |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR AND STEEL COMP 303 STEMSTEEL COMP 303 FLOW CONTROL DEVICE |
| Material | STEEL SEATRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR AND STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | STEEL SEATSTEEL COMP 303 BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| Opening Pressure Setting | 10.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| 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 |
|---|---|
| 513-50053 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| Reference | Meaning |
|---|---|
| D559T-16D-10-30 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| D559T-16D-10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-455-1097 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 4820-00-455-1097 has 1 manufacturer part number on file: 513-50053 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division).
Key specifications for 513-50053: Flow Control Device: POPPETPOPPET; Furnished Items and Quantity: 1 DEFLECTOR CAP; Connection Style: FLARED (TUBE) ALL ENDSFLARED (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDSTHREADED EXTERNAL TUBE ALL ENDS. 29 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.