The Seat,valve, cataloged under National Stock Number 4820-01-018-3978, 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 17 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-018-3978 |
| Primary Part Number | NMP1122PC27 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Thread Length | 0.531 INCHES NOMINAL FIRST THREADED PORTION IN |
| Thread Length | 1.000 INCHES NOMINAL SECOND THREADED PORTION IN |
| Seal Accommodation Type | GROOVED |
| Style Designator | DOUBLE FLANGED |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 3.000 INCHES NOMINAL IN |
| Nominal Thread Size | 2.250 INCHES FIRST THREADED PORTION IN |
| Nominal Thread Size | 3.375 INCHES SECOND THREADED PORTION 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 | 14 SECOND THREADED PORTION |
| Material | COPPER ALLOY OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Thread Series Designator | UN FIRST THREADED PORTION |
| Thread Series Designator | UNS SECOND THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| NMP1122PC27 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 009-500-0378 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP1122PC27 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 009-500-0378 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-1122 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP-1122 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 009-500-0378 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP1122PC27 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-018-3978 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 4820-01-018-3978 has 2 manufacturer part numbers on file: NMP1122PC27 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 009-500-0378 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for NMP1122PC27: Overall Height: 5.500 INCHES NOMINAL IN; Thread Length: 0.531 INCHES NOMINAL FIRST THREADED PORTION IN; Thread Length: 1.000 INCHES NOMINAL SECOND THREADED PORTION IN; Seal Accommodation Type: GROOVED. 17 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.