The Filter,gas-Particulate, cataloged under National Stock Number 4240-01-426-3277, 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 Naval Sea Systems Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4240-01-426-3277 |
| Primary Part Number | 6573317-1 |
| Item Name | Filter,gas-Particulate |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material | CELLULOSE FILTER |
| Filtration Rate | 30.000 CUBIC FEET PER MINUTE NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 4240-01-426-3277 is a Filter,gas-Particulate, manufactured by Naval Sea Systems Command, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-426-3277 has 2 manufacturer part numbers on file: 6573317-1 (Naval Sea Systems Command), 051824 (Met-Pro Corporation Div Keystone Filter Division).
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-487-8906, 6520-01-534-6278. Verify interchangeability with system specifications before substitution.
Key specifications for 6573317-1: Overall Length: 10.000 INCHES NOMINAL IN; Overall Width: 12.000 INCHES NOMINAL IN; Material: CELLULOSE FILTER; Filtration Rate: 30.000 CUBIC FEET PER MINUTE NOMINAL. 2 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.