The Stem,fluid Valve, cataloged under National Stock Number 4820-01-353-7604, 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 5 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-353-7604 |
| Primary Part Number | 51740E555 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dover Resources, Inc. Div Norriseal |
| Status | ACTIVE |
| Valve Type for Which Designed | BUTTERFLY |
| Valve Model Number for Which Designed | R285B-666AA-2PM |
| Material Document and Classification | QQ-N-286A FED SPEC SINGLE MATERIAL RESPONSE A |
| Valve Size for Which Designed | 16.000 INCHES IN |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 51740E555 PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| 920-223 ITEM 3 PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 920-223 ITEM 3 | 5/9 Secondary reference U.S. Government activity |
| 51740E555 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-353-7604 is a Stem,fluid Valve, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-353-7604 has 2 manufacturer part numbers on file: 51740E555 (Dover Resources, Inc. Div Norriseal), 920-223 ITEM 3 (Dover Resources, Inc. Div Norriseal).
Key specifications for 51740E555: Valve Type for Which Designed: BUTTERFLY; Valve Model Number for Which Designed: R285B-666AA-2PM; Material Document and Classification: QQ-N-286A FED SPEC SINGLE MATERIAL RESPONSE A; Valve Size for Which Designed: 16.000 INCHES IN. 5 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.