The Seat,valve, cataloged under National Stock Number 4820-00-399-2877, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Spirax Sarco Inc Dba Spirax Sarco. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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 | 4820-00-399-2877 |
| Primary Part Number | 42974 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Spirax Sarco Inc Dba Spirax Sarco |
| Status | ACTIVE |
| Seating Surface Shape | FLAT |
| Thread Series Designator | UNEF SINGLE THREADED PORTION |
| Flange Diameter | 1.878 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Flange Seat to Disk End Height | 0.170 INCHES NOMINAL IN |
| Thread Length | 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 0.960 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Nominal Thread Size | 1.625 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 42974 PRIMARY | Spirax Sarco Inc Dba Spirax Sarco (USA) |
NSN 4820-00-399-2877 is a Seat,valve, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-399-2877 has 1 cross-referenced part number: 42974 (Spirax Sarco Inc Dba Spirax Sarco).
There are 2 known substitutes for 4820-00-399-2877: 5950-01-123-1478, 5365-01-290-6319. Verify interchangeability with system specifications before substitution.
Key specifications for 42974: Seating Surface Shape: FLAT; Thread Series Designator: UNEF SINGLE THREADED PORTION; Flange Diameter: 1.878 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING OVERALL. 12 total characteristics are documented in the Federal Logistics Information System.