Supports 5/8" diameter shafts

An A54 V-belt typically features a 1/2" top width and a 5/16" thickness

industrial-grade plastic

and mixing applications

Using non-spec seals can lead to improper compression and subsequent leaks

Lennox 21L89 Limit Switch Supports 5/8" diameter shaftsThe Lennox 21L89 Limit Switch is a critical safety component designed for precise thermal regulation in Lennox HVAC systems. This auto limit switch features a 3 inch insert and is engineered to open the electrical circuit if the heat exchanger temperatures reach the 210F to 240F range. As a direct OEM replacement part, the 21L89 is identical to the 21L8901, ensuring a drop in fit for contractors maintaining residential furnaces and air handlers. This