3/8 HEX SOCKET SHOULDER SCREW3/8 HEX SOCKET SHOULDER SCREW 74020,25 PER BOX,1.00"LENGTH UNDER HEAD, 5/16-18, 3/16 HEX KEY 3/8" Nominal Shoulder Dia., 1" Shoulder Length, .562"-.543" Max/Min Head Dia., .250"-.240" Max/Min Head Hgt., 3/16" Hex Socket Key Size, 5/16-18 Basic Thread Size, .500" Thread Length. These are a socket head shoulder screws, but they are also called shoulder bolts or stripper bolts, and are made to ASME B18.3 Standards. They have a tensile strength of 140,000 PSI minimum in the shoulder and thread neck area. They also have a minimum of 84,000 PSI shear strength in the thread neck area. And they have a broad Rockwell "C" hardness of 32-43 on the surface. These bolts are for rotation or sliding applications, such as pulley shafts, die making, punch design, bearing pins and especially in pivot point area's.
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