The Duct Package,environment Control, cataloged under National Stock Number 4240-01-331-0173, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-01-331-0173 |
| Item Name | Duct Package,environment Control |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | C/O CARRIER,HORIZONTAL/VERTICAL ECU ASSY 5-19-11140;HORIZONTAL ECU DUCT/FRAME ASSY 5-19-11110;VERTICAL ECU DUCT,LOWER/FRAME ASSY 5-19-11108-20;VERTTICAL ECU DUCT,UPPER/FRAME ASSY 5-19-11108-10;POLYETHYLENE BAG,TYPE II,STYLE1,42 X 48 X .006 IN. THICK IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5-19-11381-10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-331-0173 is a Duct Package,environment Control, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-331-0173: General Characteristics Item Description: C/O CARRIER,HORIZONTAL/VERTICAL ECU ASSY 5-19-11140;HORIZONTAL ECU DUCT/FRAME ASSY 5-19-11110;VERTICAL ECU DUCT,LOWER/FRAME ASSY 5-19-11108-20;VERTTICAL ECU DUCT,UPPER/FRAME ASSY 5-19-11108-10;POLYETHYLENE BAG,TYPE II,STYLE1,42 X 48 X .006 IN. THICK IN; End Item Identification: XM28,SIMPLIFIED COLLECTIVE PROTECTION EQUIPMENT SYSTEM. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4240-01-331-0173 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.