The Stem and Seat Assembly, cataloged under National Stock Number 4820-00-609-9874, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fisher Controls Co Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-609-9874 |
| Primary Part Number | 1D5604000A2 |
| Item Name | Stem and Seat Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fisher Controls Co Inc |
| Status | ACTIVE |
| General Characteristics Item Description | SEAT MATERIAL BUNA-N,STEM FORGED BRASS,ASTM B16 1/2 HARD,VALVE STEM DWG 1E1963 SHOWS SURFACE A MUST HAVE SMOOTH PLATE FINISH AND MUST BE FREE OF PITS AND OTHER DEFECTS,TOP DIA OF STEM 0.062 IN.,TAPER TOP END 30ER FLASH MUST BE REMOVED TO WITHIN 1/16 IN. OF POINT B,SCRATCHES ON SURFACE MUST NOT EXTEND BEYOND C IN |
| 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 |
|---|---|
| 1D5604000A2 PRIMARY | Fisher Controls Co Inc (USA) |
| 1D5604000A2 | Emerson Process Management Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 2E1962 | 5/9 Secondary reference Fisher Controls Co Inc |
| 41A460PC4 | 5/9 Secondary reference Fisher Controls Co Inc |
| 1D5604-000A | 5/9 Secondary reference Fisher Controls Co Inc |
NSN 4820-00-609-9874 is a Stem and Seat Assembly, manufactured by Fisher Controls Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-609-9874 has 2 manufacturer part numbers on file: 1D5604000A2 (Fisher Controls Co Inc), 1D5604000A2 (Emerson Process Management Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-789-0536. Verify interchangeability with system specifications before substitution.
Key specifications for 1D5604000A2: General Characteristics Item Description: SEAT MATERIAL BUNA-N,STEM FORGED BRASS,ASTM B16 1/2 HARD,VALVE STEM DWG 1E1963 SHOWS SURFACE A MUST HAVE SMOOTH PLATE FINISH AND MUST BE FREE OF PITS AND OTHER DEFECTS,TOP DIA OF STEM 0.062 IN.,TAPER TOP END 30ER FLASH MUST BE REMOVED TO WITHIN 1/16 IN. OF POINT B,SCRATCHES ON SURFACE MUST NOT EXTEND BEYOND C IN. 1 specification is 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.