The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-173-3166, 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 The Boeing Company Div Legacy Am&m. Government technical data includes 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-173-3166 |
| Primary Part Number | L6312258-003 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Aircraft Location | USED AS WEAPONS BAY LAUNCHER AFT SUPPORT COOLING AIR TUBE |
| Aircraft Mission Design Series | B-1B |
| 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 |
|---|---|
| L6312258-003 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
NSN 1660-01-173-3166 is a Duct Assembly,air Conditioning-H, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-173-3166 has 1 manufacturer part number on file: L6312258-003 (The Boeing Company Div Legacy Am&m).
Key specifications for L6312258-003: Overall Length: 3.300 INCHES NOMINAL IN; Special Features: MADE FROM -005 ALLOY INVESTMENT CASTING LBO170-195,CLASS 11 2.150 IN O.DO.,2.000 IN. I.D.,SLOT THRU PROJECTION ON TOP 0.306 IN.LG,0.190 IN.W,NHA L6312001 IN; Aircraft Location: USED AS WEAPONS BAY LAUNCHER AFT SUPPORT COOLING AIR TUBE; End Item Identification: B-1B BOMBER AIRCRAFT. 2 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.
NSN 1660-01-173-3166 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.