5/16 HEX SOCKET SHOULDER SCREW5/16 HEX SOCKET SHOULDER SCREW 74008,25 PER BOX,.50"LENGTH UNDER HEAD, 1/4-20, 5/32 HEX KEY 5/16" Nominal Shoulder Dia., 1/2" Shoulder Length, .438"-.419" Max/Min Head Dia., .219"-.209" Max/Min Head Hgt., 5/32" Hex Socket Key Size, 1/4-20 Basic Thread Size, .438" 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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