The Seat,valve, cataloged under National Stock Number 4820-01-063-5841, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-063-5841 |
| Primary Part Number | B-114928 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Thread Length | 0.280 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN THREADED |
| Material Document and Classification | QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 2.062 INCHES NOMINAL IN |
| Nominal Thread Size | 2.625 INCHES SINGLE THREADED PORTION IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 18 SINGLE THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 71550 PIECE 16 | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 048090 PIECE 16 2IN | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| B-114928 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
NSN 4820-01-063-5841 is a Seat,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-063-5841 has 3 manufacturer part numbers on file: 71550 PIECE 16 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 048090 PIECE 16 2IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), B-114928 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for B-114928: Overall Height: 0.500 INCHES NOMINAL IN; Thread Length: 0.280 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN THREADED; Material Document and Classification: QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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.