The 3/8 Insert (spiggot) with the part number 35-1484-06 is a brass compression insert designed for use with 3/8" OD nylon tubing It is typically used in air brake systems for buses and truck. This fitting is made of CA360 brass, which provides corrosion resistance and ductility at high temperatures It has a maximum working pressure of 150 psi and operates within a temperature range of -40B0F to +200B0F