The Valve,safety Relief, cataloged under National Stock Number 4820-00-277-3853, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Telephonics Corp. Government technical data includes 15 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-277-3853 |
| Primary Part Number | 146D525-1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Telephonics Corp |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND FIRST END |
| Thread Class | 2B FIRST END |
| Thread Quantity Per Inch | 16 FIRST END |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Valve Discharge Flow Rate | 10.0 GALLONS PER MINUTE |
| Adjustable Pressure Range | +500.0 TO 4500.0 POUNDS PER SQUARE INCH LBS |
| Connection Style | GASKET SEAL(BOSS) FIRST END |
| Renewable Seat Ring Type | THREADED |
| Flow Control Device | PLUG |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Thread Series Designator | UNF FIRST END |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Operation Method | AUTOMATIC |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Disk Loading Method | SPRING |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-277-3853 is a Valve,safety Relief, manufactured by Telephonics Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-277-3853 has 2 cross-referenced part numbers: 1506-7 (Droitcour Co), 146D525-1 (Telephonics Corp).
There are 5 known substitutes for 4820-00-277-3853: 5133-00-262-2178, 5950-00-627-1232, 3110-01-030-7545 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 146D525-1: Thread Direction: RIGHT-HAND FIRST END; Thread Class: 2B FIRST END; Thread Quantity Per Inch: 16 FIRST END; Features Provided: PRESSURE TIGHT OUTLET SIDE. 15 total characteristics are documented in the Federal Logistics Information System.