The Hose Assembly,pre-Breather, cataloged under National Stock Number 1660-01-139-5690, 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 Mission Systems Orchard Park 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-139-5690 |
| Primary Part Number | 7920031-3 |
| Item Name | Hose Assembly,pre-Breather |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| General Characteristics Item Description | C/O 1 EA HOSE ASSY 90.0 IN. LG;HOSE,LOW PRESSURE;REGULATOR;CHECK VALVE AND COVER;CHAIN;CAP;CONNECTOR;O-RING;NIPPLE;2 EA HOSE CLAMP;AR SAFETY WIRE,TAPE,LUBRICANT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7920031-3 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 8148650 | A/1 Packaging identification reference U.S. Government activity |
| 7920031-3 | 5/9 Secondary reference American Safety Flight Systems Inc |
| 7920031-3 | 5/9 Secondary reference Conax Florida Corporation |
NSN 1660-01-139-5690 is a Hose Assembly,pre-Breather, manufactured by Mission Systems Orchard Park Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-139-5690 has 1 manufacturer part number on file: 7920031-3 (Mission Systems Orchard Park Inc).
Key specifications for 7920031-3: General Characteristics Item Description: C/O 1 EA HOSE ASSY 90.0 IN. LG;HOSE,LOW PRESSURE;REGULATOR;CHECK VALVE AND COVER;CHAIN;CAP;CONNECTOR;O-RING;NIPPLE;2 EA HOSE CLAMP;AR SAFETY WIRE,TAPE,LUBRICANT IN; End Item Identification: 1660011088640. 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 1660-01-139-5690 has DEMIL Code D. 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.