The Diffuser,air,aircraft Heating an, cataloged under National Stock Number 1660-01-472-8700, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-472-8700 |
| Item Name | Diffuser,air,aircraft Heating an |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Overall Diameter | 3.500 INCHES NOMINAL IN |
| General Characteristics Item Description | 20CFM AT 3 IN. H20 STATIC PRESSURE DIFFERENTIAL; DUCT AIR TEMPERATURE M65F TO P250F; LEAKAGE SHALL NOT EXCEED 0.3 CFM AT 0.075 POUND PER CUBIC FOOT DENSITY; 76 DB MAX; 90 DEGREE COUNTER CLOCKWISE NOZZLE ROTATION; 30 DEG MIN SPHERICAL ADJUSTMENT; 0.25 LB MAXIMUM; 4 MOUNTING HOLES, 0.198 INCH MINIMUM, 0.204 INCH MAXIMUM, 2.750 MOUNTING CIRCLE DIAMETER JET VELOCITY AT RATED FLOW IS 400-500 FPM AVERAGE LBS |
| Color | BLACK |
| Surface Treatment | ANODIZE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 695842-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-01-472-8700 is a Diffuser,air,aircraft Heating an, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-01-472-8700: Overall Diameter: 3.500 INCHES NOMINAL IN; General Characteristics Item Description: 20CFM AT 3 IN. H20 STATIC PRESSURE DIFFERENTIAL; DUCT AIR TEMPERATURE M65F TO P250F; LEAKAGE SHALL NOT EXCEED 0.3 CFM AT 0.075 POUND PER CUBIC FOOT DENSITY; 76 DB MAX; 90 DEGREE COUNTER CLOCKWISE NOZZLE ROTATION; 30 DEG MIN SPHERICAL ADJUSTMENT; 0.25 LB MAXIMUM; 4 MOUNTING HOLES, 0.198 INCH MINIMUM, 0.204 INCH MAXIMUM, 2.750 MOUNTING CIRCLE DIAMETER JET VELOCITY AT RATED FLOW IS 400-500 FPM AVERAGE LBS; Overall Length: 1.480 INCHES NOMINAL IN; Color: BLACK. 4 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.