The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-423-2173, 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 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-423-2173 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Aircraft Mission Design Series | B2 |
| 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 |
|---|---|
| 2411235-305 | 3/2 Design control — primary reference U.S. Government activity |
| DAA3285P001-305 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 1660-01-423-2173 is a Duct Assembly,air Conditioning-H, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-01-423-2173: Special Features: DUCT ASSY-MIXER,WARM AIR SYSTEM,3.50 TO 4.00 IN. DIA; APPROX 15.020 IN.LONG; INSULATION SHELL INCLUDED; OPERATING PRESS: 110 PSIG AT 800 DEG F; PROOF PRESS: 165 PSIG AT 1080 DEG F; BURST PRESS: 275 PSIG AT 1080 DEG F IN; End Item Identification: PACER SPECIAL; Aircraft Mission Design Series: B2. 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.
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.