The Nosecup Valve Seat Assembly, cataloged under National Stock Number 4240-01-496-2844, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4240-01-496-2844 |
| Item Name | Nosecup Valve Seat Assembly |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5-1-2748 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-496-2844 is a Nosecup Valve Seat Assembly, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5365-01-632-2593. Verify interchangeability with system specifications before substitution.
Key specifications for 4240-01-496-2844: Special Features: THE ASSEMBLY CONTAINS: 5-1-2798 NOSECUP VALVE SEAT TOPS(QTY.10) X 5-1-2799 NOSECUP VALVE SEAT BOTTOMS(QTY.10) X 5-1-2747 INSTRUCTION SHEET(QTY.1); End Item Identification: MASK,CHEMICAL-BIOLOGICAL M40A1 AND M42A2. 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.
NSN 4240-01-496-2844 has DEMIL Code Q. 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.