The Valve,butterfly, cataloged under National Stock Number 4820-01-353-7384, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dover Resources, Inc. Div Norriseal. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-353-7384 |
| Primary Part Number | R285C-666AA-2KM 8IN BTFLY |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 8.000 INCHES IN |
| Specification/standard Data | 81349-MIL-V-24624 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | A STYLE |
| Mounting Facility | WAFER |
| Face to Face Distance | 2.500 INCHES IN |
| Material | NICKEL AND ALUMINUM AND BRONZE BODY |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 920K220 | Dover Resources, Inc. Div Norriseal (USA) |
| 920-220 | Dover Resources, Inc. Div Norriseal (USA) |
| R285C-666AA-2KM 8IN BTFLY PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 920K220 | 5/9 Secondary reference U.S. Government activity |
| 920-220 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-24624 | 4/1 Identification reference U.S. Government activity |
| R285C-666AA-2KM 8INCH BTFLY | 5/9 Secondary reference U.S. Government activity |
| MIL-V-24624 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-353-7384 is a Valve,butterfly, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-353-7384 has 3 manufacturer part numbers on file: 920K220 (Dover Resources, Inc. Div Norriseal), 920-220 (Dover Resources, Inc. Div Norriseal), R285C-666AA-2KM 8IN BTFLY (Dover Resources, Inc. Div Norriseal).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-353-7677, 4820-01-355-3336, 4820-01-355-3378. Verify interchangeability with system specifications before substitution.
Key specifications for R285C-666AA-2KM 8IN BTFLY: Criticality Code Justification: FEAT; Style Designator: STRAIGHT THRU FLANGED ENDS; Valve Size: 8.000 INCHES IN; Specification/standard Data: 81349-MIL-V-24624 GOVERNMENT SPECIFICATION. 9 specifications are 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.