The Filter Unit,air Purification Sys, cataloged under National Stock Number 4460-01-675-8221, is classified within Federal Supply Class 4460 (Air Purification Equipment) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Filter Unit,air Purification Sys |
| FSC / FSG | 4460 — Air Purification Equipment (FSG 44) |
| Manufacturers | Howell Laboratories Inc Dba Howell Laboratories Inc (CAGE 22501) |
| Parameter | Value |
|---|---|
| NSN | 4460-01-675-8221 |
| Primary Part Number | 9350-S040AWM |
| Item Name | Filter Unit,air Purification Sys |
| FSC / FSG | 4460 / 44 — Air Purification Equipment |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 9350-S040AWM PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 9505-G501 | D/9 Drawing number reference only Howell Laboratories Inc Dba Howell Laboratories Inc |
NSN 4460-01-675-8221 is a Filter Unit,air Purification Sys, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4460, Air Purification Equipment. Status: active.
NSN 4460-01-675-8221 has 1 manufacturer part number on file: 9350-S040AWM (Howell Laboratories Inc Dba Howell Laboratories Inc).
1 possible match (shared part number, not a government interchangeability claim): 4460-01-675-8222. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). 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.