The Respirator,air Filtering, cataloged under National Stock Number 4240-01-250-2274, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4240-01-250-2274 |
| Primary Part Number | HON5501S |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Honeywell Safety Products Usa, Inc. |
| Status | ACTIVE |
| Mask Filter Quantity | 2 |
| Filter Type | CARTRIDGE AND FILTER PAD |
| Mask Type | HALF FACEPIECE |
| Material Type | ELASTIC |
| Criticality Code Justification | FEAT |
| Adjustability | ADJUSTABLE |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Filter Replaceability | REPLACEABLE |
| Material | RUBBER SILICONE CLASS Q MASK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| HON5501S | Larkos Packing and Distribution Inc. (USA) |
| HON5501S PRIMARY | Honeywell Safety Products Usa, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B220000 | 3/9 Design control — primary reference Survivair Corp Sub of Comasec Inc |
| 2200-00 | 5/9 Secondary reference Survivair Corp Sub of Comasec Inc |
| B220000 | 5/9 Secondary reference Honeywell Safety Products Usa, Inc. |
NSN 4240-01-250-2274 is a Respirator,air Filtering, manufactured by Honeywell Safety Products Usa, Inc., classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-250-2274 has 2 manufacturer part numbers on file: HON5501S (Larkos Packing and Distribution Inc.), HON5501S (Honeywell Safety Products Usa, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-606-5047, 5895-01-644-6979, 5210-01-662-8014. Verify interchangeability with system specifications before substitution.
Key specifications for HON5501S: Mask Filter Quantity: 2; Filter Type: CARTRIDGE AND FILTER PAD; Mask Type: HALF FACEPIECE; Material Type: ELASTIC. 10 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.