The Valve,butterfly, cataloged under National Stock Number 4820-01-421-8143, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Leslie Controls, Inc. Dba Leslie Controls Inc (CAGE 35795) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-8143 |
| Primary Part Number | YCM70912 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | CANCELLED |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2498-00-300 A 3 4IN | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| YCM70912 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 2498-00-286 4.0IN | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| M70912 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 2498-00-286 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 2498-00-300 STY-A TY-III 4IN | 5/9 Secondary reference Circor Intl Inc |
| 2498-00-300 | D/9 Drawing number reference only Circor Intl Inc |
NSN 4820-01-421-8143 is a Valve,butterfly, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: cancelled.
NSN 4820-01-421-8143 has 2 manufacturer part numbers on file: 2498-00-300 A 3 4IN (Leslie Controls, Inc. Dba Leslie Controls Inc), YCM70912 (Leslie Controls, Inc. Dba Leslie Controls Inc).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-421-8820, 4820-01-458-8578, 4820-01-458-8579. 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.
NSN 4820-01-421-8143 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.