The Stem,fluid Valve, cataloged under National Stock Number 4820-01-281-4477, 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 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-281-4477 |
| Primary Part Number | 51740C576 |
| 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 |
| Stem Actuating End Type | SQUARE |
| Material Document and Classification | ASTM B164 CLASS A ASSN STD SINGLE MATERIAL RESPONSE |
| Features Provided | LOWER STEM |
| Valve Size for Which Designed | 10.000 INCHES AND 12.000 INCHES IN |
| Material | NICKEL ALLOY 400 |
| 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 |
|---|---|
| 51740C576 PRIMARY | Dover Resources, Inc. Div Norriseal (USA) |
| Reference | Meaning |
|---|---|
| 51740C576 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-281-4477 is a Stem,fluid Valve, manufactured by Dover Resources, Inc. Div Norriseal, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-281-4477 has 1 manufacturer part number on file: 51740C576 (Dover Resources, Inc. Div Norriseal).
Key specifications for 51740C576: Valve Type for Which Designed: BUTTERFLY; Stem Actuating End Type: SQUARE; Material Document and Classification: ASTM B164 CLASS A ASSN STD SINGLE MATERIAL RESPONSE; Features Provided: LOWER STEM. 6 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.