The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-009-8612, 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 Kirkhill, Inc. Dba Kirkhill Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Kirkhill, Inc. Dba Kirkhill Inc (CAGE 75345); Northrop Grumman Systems Corporation (CAGE 26512) |
| Parameter | Value |
|---|---|
| NSN | 1660-01-009-8612 |
| Primary Part Number | D4940 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Kirkhill, Inc. Dba Kirkhill Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| D4940 PRIMARY | Kirkhill, Inc. Dba Kirkhill Inc (USA) |
| 160C955923-1 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 160C955923-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 160C955923-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| 160C955923-1 | 5/9 Secondary reference Kirkhill, Inc. Dba Kirkhill Inc |
| 160C955923 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 160C955923-1 | 5/9 Secondary reference U.S. Government activity |
NSN 1660-01-009-8612 is a Duct Assembly,air Conditioning-H, manufactured by Kirkhill, Inc. Dba Kirkhill Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-009-8612 has 2 manufacturer part numbers on file: D4940 (Kirkhill, Inc. Dba Kirkhill Inc), 160C955923-1 (Northrop Grumman Systems Corporation).
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 1660-01-009-8612 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.