四方头 meaning in English

square head

Driving squares for machine - operated socket wrenches
机动套筒扳手传动四方头
Driving squares for hand - operated socket wrenches
手动套筒板手用传动四方头
Squares of parallel shanks for rotating tools
旋转刀具圆柱柄四方头
Square head bolts for shaft guides
导轴用的四方头螺栓
Fasteners . screws for screw - jacks . small square head screws with short dog point . product grades a and b . symbol qz
紧固件.螺旋千斤顶螺钉.带短圆柱轴止端的小四方头螺钉.和级产品.符号