The Cover,nozzle,respirator, cataloged under National Stock Number 4240-01-395-4580, 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 Honeywell Safety Products Usa, Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4240-01-395-4580 |
| Primary Part Number | B520039 |
| Item Name | Cover,nozzle,respirator |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Honeywell Safety Products Usa, Inc. |
| Status | ACTIVE |
| Material | PLASTIC |
| 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 |
|---|---|
| B520039 PRIMARY | Honeywell Safety Products Usa, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 520039 | 3/9 Design control — primary reference Survivair Corp Sub of Comasec Inc |
NSN 4240-01-395-4580 is a Cover,nozzle,respirator, manufactured by Honeywell Safety Products Usa, Inc., classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-395-4580 has 1 manufacturer part number on file: B520039 (Honeywell Safety Products Usa, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5975-01-584-6169. Verify interchangeability with system specifications before substitution.
Key specifications for B520039: Special Features: MARK 2 RE PLACEMENT PART, NIOSH/MSHA, MEETS ANSI/UL 913 STANDARD FOR INTRINSICALLY SAFE APPARATUS; Material: PLASTIC. 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.