The Tailpiece,valve, cataloged under National Stock Number 4820-01-291-8631, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-291-8631 |
| Item Name | Tailpiece,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Design Type | ANGLE |
| Valve Model Number for Which Designed | VALVE SEA STANDARD |
| Connection Type | FLANGE, ROUND W/HOLES |
| Valve Size for Which Designed | 5.000 INCHES IN |
| Flange Diameter | 10.438 INCHES AND 13.500 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 |
| Reference | Meaning |
|---|---|
| 2640-050 PIECE 4 | 3/2 Design control — primary reference U.S. Government activity |
| 2640-050 | D/9 Drawing number reference only U.S. Government activity |
| SS845-1899799 | D/9 Drawing number reference only U.S. Government activity |
| SS845-1899799 PIECE 4 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-291-8631 is a Tailpiece,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-291-8631: Design Type: ANGLE; Valve Model Number for Which Designed: VALVE SEA STANDARD; Connection Type: FLANGE, ROUND W/HOLES; Valve Size for Which Designed: 5.000 INCHES IN. 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.