The Valve,ball, cataloged under National Stock Number 4810-01-577-0220, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is F.s. Welsford Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,ball |
| FSC / FSG | 4810 — Valves, Powered (FSG 48) |
| Manufacturers | F.s. Welsford Company (CAGE 0NB72) |
| Parameter | Value |
|---|---|
| NSN | 4810-01-577-0220 |
| Primary Part Number | MV50-42/121-952-270-777-071 |
| Item Name | Valve,ball |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | F.s. Welsford Company |
| Status | ACTIVE |
| 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 |
|---|---|
| MV50-42/121-952-270-777-071 | F.s. Welsford Company (USA) |
| Reference | Meaning |
|---|---|
| GBV01150-001 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4810-01-577-0220 is a Valve,ball, manufactured by F.s. Welsford Company, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-577-0220 has 1 manufacturer part number on file: MV50-42/121-952-270-777-071 (F.s. Welsford Company).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-577-0226. Verify interchangeability with system specifications before substitution.
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.