The Respirator,air Filtering, cataloged under National Stock Number 4240-01-249-9263, 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 North Safety Products L.l.c. Dba North Safety Products. Government technical data includes 12 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-249-9263 |
| Primary Part Number | 5501N95S-12 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | North Safety Products L.l.c. Dba North Safety Products |
| Status | ACTIVE |
| Mask Filter Quantity | 2 |
| Filter Type | CARTRIDGE |
| Mask Type | HALF FACEPIECE |
| Material Type | ELASTIC |
| Criticality Code Justification | FEAT |
| Approval Designator | ERR-060 |
| Adjustability | ADJUSTABLE |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Strap Type | DOUBLE |
| 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 |
|---|---|
| 5501N95S-12 PRIMARY | North Safety Products L.l.c. Dba North Safety Products (USA) |
| Reference | Meaning |
|---|---|
| 7731S | 5/9 Secondary reference Siebe North Inc North Safety Equipment Div |
NSN 4240-01-249-9263 is a Respirator,air Filtering, manufactured by North Safety Products L.l.c. Dba North Safety Products, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-249-9263 has 1 manufacturer part number on file: 5501N95S-12 (North Safety Products L.l.c. Dba North Safety Products).
Key specifications for 5501N95S-12: Mask Filter Quantity: 2; Filter Type: CARTRIDGE; Mask Type: HALF FACEPIECE; Material Type: ELASTIC. 12 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.