Atmosphere-supplying respirator (ASR) parts and accessories support and maintain the function of ASRs. Common parts consist of small hardware components including, but not limited to, gaskets, screws, pistons, o-rings, and washers, that are used to replace old or broken parts on existing units. Other parts and accessories include ASR regulators and reducers that regulate the flow of air to respirator head pieces; and ASR hoses and fittings that enable clean, breathable air to be delivered to hoods, helmets, or full facepieces.

Regulatory compliance details can be obtained at the individual product level.