List of screw drives

COUNTERSUNK HEAD SCREW 3X6

Slotted 90°Countersunk Head Screws with W & F Threads BS 450 - 1958 Display drawing: 英标BS 450

slot hot A flat head screw , or bolt , is a type of fastener characterized by a drive head that is flat or horizontal and includes a slot or phillips drive feature

slot machine tattoos Legend: b - length of the thread l - length of bolt d - the nominal diameter of the thread k - head height r - radius n