The Seat,valve, cataloged under National Stock Number 4820-00-405-4884, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Dewhurst Plc. Government technical data includes 13 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-405-4884 |
| Primary Part Number | 45-01 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Dewhurst Plc |
| Status | ACTIVE |
| Seating Surface Shape | ANGULAR |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Body Inside Diameter | 0.438 INCHES NOMINAL IN |
| Style Designator | FAUCET |
| Material | COPPER ALLOY OVERALL |
| Thread Class | 2 SINGLE THREADED PORTION |
| Thread Length | 0.174 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Seat Angle in Deg | 18.500 NOMINAL |
| Under Flange Height | 0.760 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 18 SINGLE THREADED PORTION |
| Flange Seat to Disk End Height | 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.875 INCHES SINGLE THREADED PORTION IN |
| Flange Diameter | 0.920 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-405-4884 is a Seat,valve, manufactured by Dewhurst Plc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-405-4884 has 3 cross-referenced part numbers: 45-01 (Dewhurst Plc), 1293-02 (Norgren C a Ltd), 1293-02 (Norgren Martonair Ltd).
There are 3 known substitutes for 4820-00-405-4884: 5815-00-309-3871, 4820-00-405-2336, 1560-00-925-6833. Verify interchangeability with system specifications before substitution.
Key specifications for 45-01: Seating Surface Shape: ANGULAR; Thread Series Designator: UNS SINGLE THREADED PORTION; Body Inside Diameter: 0.438 INCHES NOMINAL IN; Style Designator: FAUCET. 13 total characteristics are documented in the Federal Logistics Information System.