The Fan,centrifugal, cataloged under National Stock Number 4140-01-275-5233, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-275-5233 |
| Primary Part Number | 77H121 SZD-UB-DFA |
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Outlet Location | TOP |
| Outlet Inside Height | 1.250 INCHES NOMINAL IN |
| Style Designator | FIXED, RECTANGULAR OUTLETS |
| Discharge Direction | VERTICAL UP |
| Outlet Inside Width | 8.062 INCHES NOMINAL IN |
| Height | 13.500 INCHES NOMINAL IN |
| Width | 14.062 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 77H121 SZD-UB-DFA PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| 77H121 SZDUBOFA | C/1 Advisory reference — outside the item-of-supply concept Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| 77H121 SZDUB0FA | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4140-01-275-5233 is a Fan,centrifugal, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-275-5233 has 1 manufacturer part number on file: 77H121 SZD-UB-DFA (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
Key specifications for 77H121 SZD-UB-DFA: Outlet Location: TOP; Outlet Inside Height: 1.250 INCHES NOMINAL IN; Style Designator: FIXED, RECTANGULAR OUTLETS; Discharge Direction: VERTICAL UP. 8 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.