64 Pcs JIC 37 Degree Flare Thread Cap And Plug Assortment Kit For Hydraulic Hose Tube This assortment kit contains 64 pieces of galvanized steel caps and plugs designed for hydraulic systems.The components feature a JIC 37 degree flare angle with NPT National Pipe Thread sealing interfaces.This set includes various standard thread sizes to fit corresponding female or male threaded ports on hydraulic hose tubes and pipes.Installation requires matching the appropriate cap or plug size to the port and ensuring mating surfaces are clean before connection.Tightening should follow relevant hydraulic system standards to establish a proper seal.As a universal sealing adapter set, compatibility is determined by thread size and type rather than specific vehicle models or OE numbers.