The Seat,valve, cataloged under National Stock Number 4820-01-385-9178, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-385-9178 |
| Primary Part Number | DS-J-61052-9 PC.NO.2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.781 INCHES NOMINAL IN |
| Flange Diameter | 6.188 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES NOMINAL FIRST THREADED PORTION IN |
| Thread Length | 0.875 INCHES NOMINAL SECOND THREADED PORTION IN |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 4.000 INCHES NOMINAL IN |
| Nominal Thread Size | 3.875 INCHES FIRST THREADED PORTION IN |
| Nominal Thread Size | 4.500 INCHES SECOND THREADED PORTION IN |
| Seat Radius | 0.312 INCHES NOMINAL IN |
| Under Flange Height | 7.622 INCHES NOMINAL IN |
| Thread Class | 2A SECOND THREADED PORTION A |
| Thread Class | 2A FIRST THREADED PORTION A |
| Thread Quantity Per Inch | 16 FIRST THREADED PORTION |
| Thread Quantity Per Inch | 12 SECOND THREADED PORTION |
| Material | STEEL COMP 316 SEAT |
| Thread Series Designator | UN SECOND THREADED PORTION |
| Thread Series Designator | UN FIRST THREADED PORTION |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 128114 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| DS-J-61052-9 PC.NO.2 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| DS-J-61052-9 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
NSN 4820-01-385-9178 is a Seat,valve, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-385-9178 has 2 manufacturer part numbers on file: 128114 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), DS-J-61052-9 PC.NO.2 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-385-9200. Verify interchangeability with system specifications before substitution.
Key specifications for DS-J-61052-9 PC.NO.2: Flange Seat to Disk End Height: 0.781 INCHES NOMINAL IN; Flange Diameter: 6.188 INCHES NOMINAL IN; Thread Length: 0.875 INCHES NOMINAL FIRST THREADED PORTION IN; Thread Length: 0.875 INCHES NOMINAL SECOND THREADED PORTION IN. 18 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.