The Liner,check Valve,steam Turbine, cataloged under National Stock Number 4820-01-221-5650, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Westinghouse Electric Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Liner,check Valve,steam Turbine |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Westinghouse Electric Corp (CAGE 79500) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-5650 |
| Primary Part Number | 668J930 PIECE 34 |
| Item Name | Liner,check Valve,steam Turbine |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Westinghouse Electric Corp |
| 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 |
|---|---|
| 668J930 PIECE 34 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| NK-697 | 3/9 Design control — primary reference U.S. Government activity |
| 668J930 | D/9 Drawing number reference only Westinghouse Electric Corp |
| 366B433 | D/9 Drawing number reference only U.S. Government activity |
| 366B433 ITEM 75. | 5/2 Secondary reference U.S. Government activity |
| 668J930-34 | C/1 Advisory reference — outside the item-of-supply concept Westinghouse Electric Corp |
NSN 4820-01-221-5650 is a Liner,check Valve,steam Turbine, manufactured by Westinghouse Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-221-5650 has 1 manufacturer part number on file: 668J930 PIECE 34 (Westinghouse Electric Corp).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-221-5651, 4820-01-221-7496. 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.