The Seat,valve, cataloged under National Stock Number 4820-00-587-7121, 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 19 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-587-7121 |
| Primary Part Number | 0093040040 |
| 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 | 0.500 INCHES NOMINAL IN |
| Flange Diameter | 3.625 INCHES NOMINAL IN |
| Thread Length | 0.438 INCHES NOMINAL FIRST THREADED PORTION IN |
| Thread Length | 0.750 INCHES NOMINAL SECOND THREADED PORTION IN |
| Body Stepped Inside Diameter | 1.000 INCHES MINIMUM AND 1.003 INCHES MAXIMUM FIRST STEP IN |
| Body Stepped Inside Diameter | 1.750 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 2.000 INCHES NOMINAL THIRD STEP IN |
| Style Designator | DOUBLE FLANGED |
| Nominal Thread Size | 1.450 INCHES FIRST THREADED PORTION IN |
| Nominal Thread Size | 2.375 INCHES SECOND THREADED PORTION IN |
| Under Flange Height | 5.000 INCHES NOMINAL IN |
| Thread Class | 2A SECOND THREADED PORTION A |
| Thread Class | 2A FIRST THREADED PORTION A |
| Thread Quantity Per Inch | 14 SECOND THREADED PORTION |
| Thread Quantity Per Inch | 24 FIRST THREADED PORTION |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNS FIRST THREADED PORTION |
| Thread Series Designator | UNS SECOND THREADED PORTION |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 0093040040 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 52-3-21 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| 52-3-21 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 009-304-0040 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 52-3-21 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 009-304-0040 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-00-587-7121 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 4820-00-587-7121 has 2 manufacturer part numbers on file: 0093040040 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 52-3-21 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
5 possible matches (shared part number, not a government interchangeability claim): 5935-00-681-4910, 6105-00-793-0141, 5340-01-019-4502. Verify interchangeability with system specifications before substitution.
Key specifications for 0093040040: Flange Seat to Disk End Height: 0.500 INCHES NOMINAL IN; Flange Diameter: 3.625 INCHES NOMINAL IN; Overall Height: 1.188 INCHES NOMINAL IN; Thread Length: 0.438 INCHES NOMINAL FIRST THREADED PORTION IN. 19 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.