The Disk,valve, cataloged under National Stock Number 4820-01-121-9855, 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 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-121-9855 |
| Primary Part Number | 005-303-0411 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Shank Diameter | 0.559 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 1.437 INCHES NOMINAL IN |
| Outside Diameter | 0.938 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Inside Diameter | 0.464 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| NMP1151 PIECE 17 3/4X1IN | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| 005-303-0411 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| C-5488 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| NMP-1151 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| NMP1151 PIECE 17 3/4X1IN | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 005.303.0411 | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
| NMP1151 PIECE 17 3/4X1IN | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 005-303-0411 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 005-303-0411 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-1151 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| C-5488 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| C-5488 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-121-9855 is a Disk,valve, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-9855 has 3 manufacturer part numbers on file: NMP1151 PIECE 17 3/4X1IN (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 005-303-0411 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), C-5488 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-122-3392. Verify interchangeability with system specifications before substitution.
Key specifications for 005-303-0411: Shank Diameter: 0.559 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Flange Seat to Disk End Height: 1.437 INCHES NOMINAL IN; Overall Height: 1.906 INCHES NOMINAL IN; Outside Diameter: 0.938 INCHES NOMINAL IN. 7 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.