The Cap,valve, cataloged under National Stock Number 4820-01-447-7770, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-447-7770 |
| Primary Part Number | 63502-B 1861 SWE 1/2 PART 9 |
| Item Name | Cap,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Valve Type for Which Designed | GLOBE |
| Valve Model Number for Which Designed | 63502-B 1861 SWE |
| Valve Size for Which Designed | 0.500 INCHES IN |
| Attachment Method | BOLTS |
| 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 |
|---|---|
| 63502-B 1861 SWE 1/2 PART 9 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 63502-B 1861 SWE 1/2 PART 9 | 5/9 Secondary reference Mutual Mfg and Supply Co |
| 63502-B | D/9 Drawing number reference only William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-447-7770 is a Cap,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-447-7770 has 1 manufacturer part number on file: 63502-B 1861 SWE 1/2 PART 9 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-447-7782, 4820-01-447-7984, 4730-01-448-8848. Verify interchangeability with system specifications before substitution.
Key specifications for 63502-B 1861 SWE 1/2 PART 9: Valve Type for Which Designed: GLOBE; Valve Model Number for Which Designed: 63502-B 1861 SWE; Valve Size for Which Designed: 0.500 INCHES IN; End Item Identification: WHIDBEY ISLAND CLASS LSD. 4 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.