The Guard,fan Impeller, cataloged under National Stock Number 4140-01-280-3003, 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 Api Heat Transfer Thermasys Corporation. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4140-01-280-3003 |
| Primary Part Number | FG-1657 |
| Item Name | Guard,fan Impeller |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Api Heat Transfer Thermasys Corporation |
| 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 |
|---|---|
| 9-726-100075 | Grove U.s. Llc Dba Grove Us Llc (USA) |
| FG-1657 PRIMARY | Api Heat Transfer Thermasys Corporation (USA) |
| Reference | Meaning |
|---|---|
| SPL-1657 | 5/9 Secondary reference Thermasys Corporation Dba General Thermo Dynamics Div General Thermodynamics Div |
| FG-1657 | 3/9 Design control — primary reference Thermasys Corporation Dba General Thermo Dynamics Div General Thermodynamics Div |
NSN 4140-01-280-3003 is a Guard,fan Impeller, manufactured by Api Heat Transfer Thermasys Corporation, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-280-3003 has 2 manufacturer part numbers on file: 9-726-100075 (Grove U.s. Llc Dba Grove Us Llc), FG-1657 (Api Heat Transfer Thermasys Corporation).
Key specifications for FG-1657: Special Features: 24.00 IN.NOM DIA,2.25 IN.H;FOUR 0.379 IN.DIA MTG HOLES LOCATED 90 DEG APART ON A 25.62 IN.DIA BOLT CIRCLE; IN; End Item Identification: 3810-01-205-2716CRANE,WHEEL MOUNTED. 0 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.