The Valve,safety Relief, cataloged under National Stock Number 4820-01-259-8777, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-259-8777 |
| Primary Part Number | 4875-G503 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Nominal Thread Size | 1.000 INCHES ALL ENDS IN |
| Material | STEEL CORROSION RESISTING BODY |
| Flow Control Device | PISTON |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Thread Series Designator | NPT ALL ENDS |
| Adjustable Pressure Range | +6.0 TO 14.0 POUNDS PER SQUARE INCH LBS |
| Style Designator | STRAIGHT THRU |
| Valve Operation Method | AUTOMATIC |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4875C-G503 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 4875C-G503 | Lindco-Springfield, Inc Dba Lindco Controls Div (USA) |
| 4875-G503 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 4875 | Lindco-Springfield, Inc Dba Lindco Controls Div (USA) |
| 4875 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| X559T1-8M-10 | Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA) |
NSN 4820-01-259-8777 is a Valve,safety Relief, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-259-8777 has 6 cross-referenced part numbers: 4875C-G503 (Howell Laboratories Inc Dba Howell Laboratories Inc), 4875C-G503 (Lindco-Springfield, Inc Dba Lindco Controls Div), 4875-G503 (Howell Laboratories Inc Dba Howell Laboratories Inc), 4875 (Lindco-Springfield, Inc Dba Lindco Controls Div), 4875 (Howell Laboratories Inc Dba Howell Laboratories Inc) and 1 more.
There are 12 known substitutes for 4820-01-259-8777: 5940-00-143-4780, 4320-00-585-7770, 5940-00-617-2430 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4875-G503: Nominal Thread Size: 1.000 INCHES ALL ENDS IN; Material: STEEL CORROSION RESISTING BODY; Flow Control Device: PISTON; Connection Style: PLAIN (PIPE) ALL ENDS. 10 total characteristics are documented in the Federal Logistics Information System.