The Valve,butterfly, cataloged under National Stock Number 4820-01-538-9936, 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 Dba Marine Product Team Div Marine Product Team. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team (CAGE 1X5W8) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-538-9936 |
| Primary Part Number | TFC-VA-00662 2.50IN |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team |
| Status | ACTIVE |
| 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 |
|---|---|
| TFC-VA-00662 2.50IN PRIMARY | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team (USA) |
| Reference | Meaning |
|---|---|
| TFC-VA-00662 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team |
NSN 4820-01-538-9936 is a Valve,butterfly, manufactured by Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-538-9936 has 1 manufacturer part number on file: TFC-VA-00662 2.50IN (Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-538-9949, 4820-01-538-9959, 4820-01-538-9970. Verify interchangeability with system specifications before substitution.
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.