The Valve,restrictor Check, cataloged under National Stock Number 4820-00-532-1541, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-532-1541 |
| Primary Part Number | 57675 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Mounting Position | HORIZONTAL |
| Flow Control Device | POPPET |
| Media for Which Designed | AIR FIRST RESPONSE |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Thread Class | 3A ALL ENDS A |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.437 INCHES ALL ENDS IN |
| Surface Treatment | CHROMATE |
| Style Designator | STRAIGHT THRU |
| Material | RUBBER SYNTHETIC PACKING |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| Media for Which Designed | GAS, INERT SECOND RESPONSE |
| Material | STEEL BODY |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Material | STEEL FLOW CONTROL DEVICE |
| Aperture Diameter | 0.012 INCHES MINIMUM AND 0.015 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-532-1541 is a Valve,restrictor Check, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-532-1541 has 2 cross-referenced part numbers: 57675 (Alliedsignal Inc Dba Allied-Signal Aerospace Co), 57675 (Honeywell International Inc. Div Aerospace - Torrance).
There are 2 known substitutes for 4820-00-532-1541: 3120-00-429-7784, 5330-00-950-1828. Verify interchangeability with system specifications before substitution.
Key specifications for 57675: Mounting Position: HORIZONTAL; Flow Control Device: POPPET; Media for Which Designed: AIR FIRST RESPONSE; Disk Loading Method: SPRING. 21 total characteristics are documented in the Federal Logistics Information System.