TYPES OF SCREW HEADS NO FURTHER A MYSTERY

The ‘pan’ head is the most commonly applied rounded-major screw head. It works very well in A selection of programs that need a flat-bottomed screw. since the geometry will not be recessed and comprises merely two stacked simple milling slots, a double-slotted screw generate is not considered to be cruciform. In ISO 4757, Cross recesses for sc