The Valve,safety Relief, cataloged under National Stock Number 4820-01-047-2940, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-047-2940 |
| Primary Part Number | 3474 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Bonnet Type | INSIDE SPRING |
| Nominal Thread Size | 0.5625 INCHES SECOND END IN |
| Thread Class | 3A SECOND END A |
| Thread Direction | RIGHT-HAND FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Disk Loading Method | SPRING |
| Connection Style | FLARED (TUBE) SECOND END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Nominal Thread Size | 0.4375 INCHES FIRST END IN |
| Flow Control Device | POPPET |
| Thread Class | 3A FIRST END A |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Valve Operation Method | AUTOMATIC |
| Thread Direction | RIGHT-HAND SECOND END |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Surface Treatment | ANODIZE LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-047-2940 is a Valve,safety Relief, manufactured by Tactair Fluid Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-047-2940 has 3 cross-referenced part numbers: 3474 (Tactair Fluid Controls Inc), 3474 (Kaiser Fluid Technologies Inc.), 3474 (Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair).
There are 10 known substitutes for 4820-01-047-2940: 6605-00-209-2055, 3110-00-227-4060, 5120-00-596-4159 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3474: Connection Style: FLARELESS (TUBE) FIRST END; Bonnet Type: INSIDE SPRING; Nominal Thread Size: 0.5625 INCHES SECOND END IN; Thread Class: 3A SECOND END A. 20 total characteristics are documented in the Federal Logistics Information System.