The Mouthpiece Assembly, cataloged under National Stock Number 4240-01-464-2275, 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 Ocenco Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-464-2275 |
| Primary Part Number | 643102 |
| Item Name | Mouthpiece Assembly |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Ocenco Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 643102 PRIMARY | Ocenco Inc (USA) |
NSN 4240-01-464-2275 is a Mouthpiece Assembly, manufactured by Ocenco Inc, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-464-2275 has 1 manufacturer part number on file: 643102 (Ocenco Inc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-545-8282. Verify interchangeability with system specifications before substitution.
Key specifications for 643102: Special Features: SUBJECT ITEM IS A SOLE SOURCE WITH OCENCO INC (03WY2) PRODUCT NO. 643102 (MOUTHPIECE ASSEMBLY USED F/T M20.2T TRAINER MAIN ASSEMBLY), THIS IS AN ACCESSORY PART FOR THE EMERGENCY ESCAPE BREATHING (EEBD), NO FIRST ARTICLESWILL BE REQUIRED SINCE THE END ITEM QUALITY WILL BE ASSURED BY NIOSH CERTIFICATION, PGC ASSIGNED TO THIS NSN IS 25788. 0 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.