3M 603 N95 pad filter adapter for respirator mask

Pad filter adapter for 3M respirator with bayonet mounts. Replacement for 3M 603 filter adapter.

This is a pair of adapters that allow a 3M respirator, which normally takes cartridge filters, to take only N95 pad filters. This is a home-made replacement for the OEM part from 3M called “Filter Adapter 603”. It is compatible with all the same filter pads and respirators as the OEM part, as well as 3M Filter Retainer 501 (shown in pictures). However, unlike the OEM part, this model has unique left-side and right-side parts. Each side is labeled. If the correct part is not used on the corresponding side of the mask, then the parts will not rotate into the correct angle.