# NSN 4240-01-247-7239: Filter, Respirator, Air Filtering

NSN 4240-01-247-7239 (also written 4240012477239; NIIN 01-247-7239) is a filter, respirator, air filtering in Federal Supply Class 4240, Safety and Rescue Equipment. 4 manufacturer part numbers from 3 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4240-01-247-7239 (4240012477239)
- NIIN: 01-247-7239 (012477239)
- Item name: FILTER,RESPIRATOR,AIR FILTERING
- Federal Supply Class: [FSC 4240 Safety and Rescue Equipment](https://nsnexplorer.com/fsc/4240/)
- Federal Supply Group: [FSG 42](https://nsnexplorer.com/group/42/)
- Acquisition method suffix code: AMSC Z: a commercial, nondevelopmental or off-the-shelf item. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AJCB | HAZARD PROTECTION FEATURE | DUST AND MIST AND METAL FUMES |
| CRTL | CRITICALITY CODE JUSTIFICATION | FEAT |
| FEAT | SPECIAL FEATURES | SOLE SOURCE REQUIRED BY STATUTE 6.302; TC-21C-297 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 51019 | 02622 | AMERICAN OPTICAL CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51019 | 88309 | AEARO COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| R50AW | 02622 | AMERICAN OPTICAL CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| R50AW | 63984 | SQUARE D CO MONROE PLANT | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4240012477239&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4240012477239
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4240-01-247-7239/
JSON: https://nsnexplorer.com/api/nsn/4240-01-247-7239.json