The Disk,valve, cataloged under National Stock Number 4820-01-203-2478, 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 2 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-203-2478 |
| Primary Part Number | 0051050086 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Material Document and Classification | ASTM B2 ALLOY 64 HALF HARD TEMPER ASSN STD SINGLE MATERIAL RESPONSE |
| Material | COPPER ALLOY 464 |
| 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 |
|---|---|
| 0051050086 PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| A1944 PIECE 27-0 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| A1944 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| A1944 PIECE 27-0051050086 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| 0051050086 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| A1944 PIECE 27-0051050086 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 0051050086 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| A1944 | D/9 Drawing number reference only Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-203-2478 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 4820-01-203-2478 has 2 manufacturer part numbers on file: 0051050086 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), A1944 PIECE 27-0 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-204-0624, 5310-01-396-8385, 8455-01-561-3800. Verify interchangeability with system specifications before substitution.
Key specifications for 0051050086: Material Document and Classification: ASTM B2 ALLOY 64 HALF HARD TEMPER ASSN STD SINGLE MATERIAL RESPONSE; Material: COPPER ALLOY 464. 2 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.