The Adapter and Retainer Assy,air Du, cataloged under National Stock Number 4240-00-489-5135, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-00-489-5135 |
| Item Name | Adapter and Retainer Assy,air Du |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | 12.00 IN.O.D;4.25 IN.W;2 TUBES CRES.500 O.D.T.065 WALL,TYPE 304 MIL-T-8506 TYPE 1 OR TYPE 2;FINISH 4.2+21.11 MIL-STD-171 COLOR OLIVE DRAB NO.24087 FED-STD-595;CONSISTS OF TUBES,ADAPTER,AIR DUCT IN |
| 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 |
|---|---|
| C5-19-4944 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-00-489-5135 is a Adapter and Retainer Assy,air Du, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-00-489-5135: General Characteristics Item Description: 12.00 IN.O.D;4.25 IN.W;2 TUBES CRES.500 O.D.T.065 WALL,TYPE 304 MIL-T-8506 TYPE 1 OR TYPE 2;FINISH 4.2+21.11 MIL-STD-171 COLOR OLIVE DRAB NO.24087 FED-STD-595;CONSISTS OF TUBES,ADAPTER,AIR DUCT IN; End Item Identification: 4240-00-854-4144. 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.
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.