The Tube Assembly,air Distribution,r, cataloged under National Stock Number 4240-01-331-4137, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-01-331-4137 |
| Item Name | Tube Assembly,air Distribution,r |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | 1 EA RN 5-1-1345 WIPER SEAL ASSY;1 EA RN 5-1-2222 HOOK ASSY,WITH HANDLE; 1 EA RN 5-1-1463 BRACKET,STRAP; 1 EA RN 5-1-1464 SHOULDER PIN,STRAP BRACKET; 1 EA RN 5-1-2047-1 PLATE,COVER/ADAPTER; 1 EA RN 5-1-2043GASKET; 3 EA RN NAS1352C04LE14 SCREW; 2 EA RN NAS1635-04LE4P SCREW,PAN HD; 1 EA RN MS16633-4012 RING,RETAINING |
| 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 |
|---|---|
| 5-1-2214-20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-331-4137 is a Tube Assembly,air Distribution,r, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-331-4137: General Characteristics Item Description: 1 EA RN 5-1-1345 WIPER SEAL ASSY;1 EA RN 5-1-2222 HOOK ASSY,WITH HANDLE; 1 EA RN 5-1-1463 BRACKET,STRAP; 1 EA RN 5-1-1464 SHOULDER PIN,STRAP BRACKET; 1 EA RN 5-1-2047-1 PLATE,COVER/ADAPTER; 1 EA RN 5-1-2043GASKET; 3 EA RN NAS1352C04LE14 SCREW; 2 EA RN NAS1635-04LE4P SCREW,PAN HD; 1 EA RN MS16633-4012 RING,RETAINING; End Item Identification: MASK,CHEMICAL-BIOLOGICAL M43E1. 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.