The Facepiece,breathing Equipment, cataloged under National Stock Number 4240-00-574-2038, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-00-574-2038 |
| Primary Part Number | 1748672 |
| Item Name | Facepiece,breathing Equipment |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Facepiece Speaking Diaphragm | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 507-1748672 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 77445 | Mine Safety Appliances Company (USA) |
| 1748672 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 4240-00-574-2038 is a Facepiece,breathing Equipment, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-00-574-2038 has 3 manufacturer part numbers on file: 507-1748672 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 77445 (Mine Safety Appliances Company), 1748672 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
3 possible matches (shared part number, not a government interchangeability claim): 4810-01-147-2227, 5310-01-334-4220, 5995-01-541-4696. Verify interchangeability with system specifications before substitution.
Key specifications for 1748672: Facepiece Speaking Diaphragm: INCLUDED; Special Features: W/SPEAKING DIAPHRAGM AND TWO BREATHING TUBES; End Item Identification: NAVY OXYGEN BREATHING APPARATUS. 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 4240-00-574-2038 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.