The Housing,demand Regulator,mark II, cataloged under National Stock Number 4240-01-218-2650, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-01-218-2650 |
| Item Name | Housing,demand Regulator,mark II |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL; ALUMINUM,6061-T651; FINISH; ANODIZE,BLACK PER HSES-001; LENGTH 49.0 MM; HEIGHT 37.90 MM MM |
| Reference Data and Literature | AF TO. 14S5-24-1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 3529971-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-218-2650 is a Housing,demand Regulator,mark II, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-218-2650: General Characteristics Item Description: MATERIAL; ALUMINUM,6061-T651; FINISH; ANODIZE,BLACK PER HSES-001; LENGTH 49.0 MM; HEIGHT 37.90 MM MM; Reference Data and Literature: AF TO. 14S5-24-1; End Item Identification: SELF-CONTAINED BREATHING APPARATUS,NSN 4240-01-233-5796. 2 specifications are 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.
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.