The Disk Assembly,valve, cataloged under National Stock Number 4820-01-192-5638, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mission Systems Orchard Park Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Disk Assembly,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Eci Defense Group, Inc. (CAGE 4BJ65); Mission Systems Orchard Park Inc (CAGE 04577) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-192-5638 |
| Primary Part Number | 1970 502 3-3 |
| Item Name | Disk Assembly,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 1970 502 3-3 | Eci Defense Group, Inc. (USA) |
| 1970 502 3-3 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 1970 502 3 | D/9 Drawing number reference only Mission Systems Orchard Park Inc |
| 1970 502 3-3 | 5/9 Secondary reference Carleton Technologies Inc Div Tampa Facility |
NSN 4820-01-192-5638 is a Disk Assembly,valve, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-192-5638 has 2 manufacturer part numbers on file: 1970 502 3-3 (Eci Defense Group, Inc.), 1970 502 3-3 (Mission Systems Orchard Park Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-486-8491, 2040-01-656-2615. 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.