The Parts Kit,respirator, cataloged under National Stock Number 4240-01-359-5641, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-01-359-5641 |
| Item Name | Parts Kit,respirator |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| FSC Application Data | ONE HOUR SCBA |
| Supplementary Features | CW KIT DESIGNED TO PROVIDE USER WITH A CAPABILITY TO CONVERT COMMERCIAL SCBA INTO AN APPARATUS THAT WILL ALLOW A USER TO SWITCH FROM BREATHABLE AIR FROM A COMPRESSED AIR CYLINDER OR SUPPLIED AIR TO OUTSIDE AIR FILTERED THROUGH A CHEMICAL-BIOLOGICAL FILTER;PRECLUDES BREATHING OUTSIDE FILTERED AIR WHEN SUPPLIED AIR IS PROVIDED (WHEN THE CW MASK IS IN A SUPPLIED AIR MODE),DESIGNED TO PERMIT A RAPID EXCHANGE OF FACEPIECES:SCBA TO CW MASK,CW MASK TO SCBA MASK WITHOUT LOSS OF COMPRESSED AIR;PROHIBITS THE ADMISSION OF CONTAMINATED ATMOSPHERE INTO THE FACEPIECE WHILE CONNECTING CW MASK TO SUPPLIED AIR SOURCE |
| Functional Description | CHEMICAL WARFARE KIT WILL INTERFACE WITH SELF-CONTAINED BREATHING APPARTUS (SCBA) WORN BY FIRE FIGHTERS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 93107121 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-359-5641 is a Parts Kit,respirator, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-359-5641: FSC Application Data: ONE HOUR SCBA; Supplementary Features: CW KIT DESIGNED TO PROVIDE USER WITH A CAPABILITY TO CONVERT COMMERCIAL SCBA INTO AN APPARATUS THAT WILL ALLOW A USER TO SWITCH FROM BREATHABLE AIR FROM A COMPRESSED AIR CYLINDER OR SUPPLIED AIR TO OUTSIDE AIR FILTERED THROUGH A CHEMICAL-BIOLOGICAL FILTER;PRECLUDES BREATHING OUTSIDE FILTERED AIR WHEN SUPPLIED AIR IS PROVIDED (WHEN THE CW MASK IS IN A SUPPLIED AIR MODE),DESIGNED TO PERMIT A RAPID EXCHANGE OF FACEPIECES:SCBA TO CW MASK,CW MASK TO SCBA MASK WITHOUT LOSS OF COMPRESSED AIR;PROHIBITS THE ADMISSION OF CONTAMINATED ATMOSPHERE INTO THE FACEPIECE WHILE CONNECTING CW MASK TO SUPPLIED AIR SOURCE; Special Features: CW KIT PROVIDES A CHEMICAL-BIOLOGICAL PROTECTIVE HOOD THAT PREVENTS CW INTRUSION AT THE HOOD/FACEPIECE ASSY; KIT CONSISTS OF:CW MASK FACEPIECE ASSYCAPABLE OF USING SUPPLIED AIR OR FILTERED AIR THROUGH THE C-2 (CHEMICAL-BIOLOGICAL) CANISTER,THREE C-2 CANISTERS,THREE:CHEM-BIOL PROTECTIVE HOODS,ONE:CARRIER FOR CW MASK ASSY,ONE: WATERPROOF BAG; Functional Description: CHEMICAL WARFARE KIT WILL INTERFACE WITH SELF-CONTAINED BREATHING APPARTUS (SCBA) WORN BY FIRE FIGHTERS. 3 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.
NSN 4240-01-359-5641 has DEMIL Code C. 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.