The Valve,check, cataloged under National Stock Number 4820-01-128-4546, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Pierce Manufacturing Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-128-4546 |
| Primary Part Number | 51-0029 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Pierce Manufacturing Inc |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material | COPPER ALLOY OVERALL |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Disk Loading Method | SPRING |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Flow Control Device | DISK |
| Valve Operation Method | AUTOMATIC |
| Maximum Operating Temp | 212.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-128-4546 is a Valve,check, manufactured by Pierce Manufacturing Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-128-4546 has 3 cross-referenced part numbers: 51-0029 (Pierce Manufacturing Inc), 451-0029 (Pierce Manufacturing Inc), 903001 (Eclipse Inc Rockford-Eclipse Div).
There are 8 known substitutes for 4820-01-128-4546: 5905-00-141-1183, 3110-00-554-5387, 5995-01-252-6565 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 51-0029: Style Designator: STRAIGHT THRU; Material: COPPER ALLOY OVERALL; Nominal Thread Size: 0.375 INCHES ALL ENDS IN; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS. 16 total characteristics are documented in the Federal Logistics Information System.