The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-00-618-4546, 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 Electrical Insulation Suppliers Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-00-618-4546 |
| Primary Part Number | 40620 |
| Item Name | Impeller,fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Electrical Insulation Suppliers Inc |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Style Designator | CURVED BLADES SINGLE WIDTH |
| Attachment Method | BOLT HOLE |
| Mounting Hole Diameter | 0.188 INCHES NOMINAL IN |
| Diameter | 6.312 INCHES NOMINAL IN |
| Blade Quantity | 32 |
| Mounting Bolt Circle Diameter | 2.406 INCHES NOMINAL IN |
| Width | 2.625 INCHES NOMINAL IN |
| Material | ALUMINUM BLADE |
| 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 |
|---|---|
| 40620 | Electrical Insulation Suppliers Inc (USA) |
| Reference | Meaning |
|---|---|
| 631-20S | 3/2 Design control — primary reference U.S. Government activity |
NSN 4140-00-618-4546 is a Impeller,fan,centrifugal, manufactured by Electrical Insulation Suppliers Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-00-618-4546 has 1 manufacturer part number on file: 40620 (Electrical Insulation Suppliers Inc).
5 possible matches (shared part number, not a government interchangeability claim): 5998-01-383-0478, 5305-01-451-0604, 5133-01-460-2392. Verify interchangeability with system specifications before substitution.
Key specifications for 40620: Mounting Hole Quantity: 4; Style Designator: CURVED BLADES SINGLE WIDTH; Attachment Method: BOLT HOLE; Mounting Hole Diameter: 0.188 INCHES NOMINAL IN. 9 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.