This 3.75” long, 1” diameter pin & block universal joint is machined from AISI 303 stainless steel yokes and 416L pins & blocks, for corrosion resistance in a pipeline application. The special pin-bores with milled seating areas for the pins are notably different from regular pin bores. Nitrile lubricant-retaining boots protect the moving components from contamination and extend the life of the universal joint. The above image is partially exposed for a better view into the joint and its components.