The Valve Block, cataloged under National Stock Number 4820-01-149-3443, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve Block |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (CAGE 11440) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-149-3443 |
| Primary Part Number | E-171-423 |
| Item Name | Valve Block |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
| 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 |
|---|---|
| E-171-423 PRIMARY | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| E-171-422-401 | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| Reference | Meaning |
|---|---|
| E-171-422-B PIE | C/1 Advisory reference — outside the item-of-supply concept Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
| E-171-422 | D/9 Drawing number reference only Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
NSN 4820-01-149-3443 is a Valve Block, manufactured by Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-149-3443 has 2 manufacturer part numbers on file: E-171-423 (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), E-171-422-401 (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric).
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.