The Fan,centrifugal, cataloged under National Stock Number 1660-01-571-5624, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Cooler Master Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-01-571-5624 |
| Primary Part Number | R4-L2R-20AC-GP |
| Item Name | Fan,centrifugal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Cooler Master Inc |
| Status | ACTIVE |
| Air Flow Rate | 30.0 CUBIC FEET PER MINUTE MINIMUM AND 79.0 CUBIC FEET PER MINUTE MAXIMUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| R4-L2R-20AC-GP PRIMARY | Cooler Master Inc |
| Reference | Meaning |
|---|---|
| 299936 | 5/9 Secondary reference Compusa Inc |
| 171467-1 | 5/9 Secondary reference U.S. Government activity |
NSN 1660-01-571-5624 is a Fan,centrifugal, manufactured by Cooler Master Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-571-5624 has 1 manufacturer part number on file: R4-L2R-20AC-GP (Cooler Master Inc).
Key specifications for R4-L2R-20AC-GP: Special Features: RATED VOLTAGE 12V V; Part Name Assigned by Controlling Agency: CARD CAGE FAN; End Item Identification: MEMORY DEVICE LOAD; Air Flow Rate: 30.0 CUBIC FEET PER MINUTE MINIMUM AND 79.0 CUBIC FEET PER MINUTE MAXIMUM. 1 specification is 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.
NSN 1660-01-571-5624 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.