The Control Block Assem, cataloged under National Stock Number 4530-01-257-1388, is classified within Federal Supply Class 4530 (Fuel Burning Equipment Units) of the Plumbing, Heating, and Waste Disposal 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Control Block Assem |
| FSC / FSG | 4530 — Fuel Burning Equipment Units (FSG 45) |
| Manufacturers | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (CAGE 11440) |
| Parameter | Value |
|---|---|
| NSN | 4530-01-257-1388 |
| Primary Part Number | 950M |
| Item Name | Control Block Assem |
| FSC / FSG | 4530 / 45 — Fuel Burning Equipment Units |
| 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) |
| Part Number | Manufacturer |
|---|---|
| E-171-820-R-J-I-950M | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| 950M PRIMARY | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| Reference | Meaning |
|---|---|
| E-171-820 | 5/9 Secondary reference Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
NSN 4530-01-257-1388 is a Control Block Assem, manufactured by Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric, classified under FSC 4530, Fuel Burning Equipment Units. Status: active.
NSN 4530-01-257-1388 has 2 manufacturer part numbers on file: E-171-820-R-J-I-950M (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), 950M (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-387-4738. 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.