The Gear Operator,valve, cataloged under National Stock Number 4820-01-436-4204, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cunico Corporation. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Gear Operator,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Cunico Corporation (CAGE 53424) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-436-4204 |
| Primary Part Number | DD-1531 ITEM 17 |
| Item Name | Gear Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cunico Corporation |
| 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 |
|---|---|
| DD-1531 ITEM 17 PRIMARY | Cunico Corporation (USA) |
| Reference | Meaning |
|---|---|
| 85-270 | C/1 Advisory reference — outside the item-of-supply concept Cunico Corporation |
| DD-4531 REF NO 22 | C/1 Advisory reference — outside the item-of-supply concept Cunico Corporation |
| DD-4905 REF NO 22 | C/1 Advisory reference — outside the item-of-supply concept Cunico Corporation |
| DD-1531 | D/9 Drawing number reference only Cunico Corporation |
| DD-4520 REF NO 22 | C/1 Advisory reference — outside the item-of-supply concept Cunico Corporation |
| DD-4651 REF NO 22 | C/1 Advisory reference — outside the item-of-supply concept Cunico Corporation |
NSN 4820-01-436-4204 is a Gear Operator,valve, manufactured by Cunico Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-436-4204 has 1 manufacturer part number on file: DD-1531 ITEM 17 (Cunico Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-487-4541, 7610-01-729-5254. 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.