The Respirator,air Filtering, cataloged under National Stock Number 4240-01-389-1750, 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 Arbill Industries Inc Div Arbill. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-389-1750 |
| Primary Part Number | A503902 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Arbill Industries Inc Div Arbill |
| Status | ACTIVE |
| Filter Replaceability | NONREPLACEABLE |
| 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 |
|---|---|
| A503902 PRIMARY | Arbill Industries Inc Div Arbill (USA) |
| B260000 | Honeywell Safety Products Usa, Inc. (USA) |
| Reference | Meaning |
|---|---|
| N94H004 | 5/1 Secondary reference Naval Medical Material Support Command Detachment |
| 94-8-23-2 DE | 5/1 Secondary reference Naval Medical Material Support Command Detachment |
NSN 4240-01-389-1750 is a Respirator,air Filtering, manufactured by Arbill Industries Inc Div Arbill, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-389-1750 has 2 manufacturer part numbers on file: A503902 (Arbill Industries Inc Div Arbill), B260000 (Honeywell Safety Products Usa, Inc.).
Key specifications for A503902: Special Features: MEDIUM SIZE; PATENTED FOAM SEALING FLANGE, HYPO-ALLERGENIC, INERT MATERIAL; HALF-MASK RESPIRATOR; HEPA-TECH TRI-FILTER MATERIAL, CONTAINS NO FIBERGLASS, SELF-EXTINGUISHING; FILTRATION CHARACTERISTICS 99.7% EFFICIENT AGAINST 0.3 MICRON MONODISPERSE DOP AEROSOL; BRAIDED-ELASTIC-FABRIC ADJUSTABLE HEADBAND; COMPATIBLE FIT WITH OTHER SAFETY PRODUCTS; P100 FILTERS USED W/MASK (P/N 105005); Filter Replaceability: NONREPLACEABLE. 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.
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.