The screw rod is a machine screw (mechanical screw), which is the kind of flat head at the front end. The screw pitch is small and uniform. It is generally used to fasten metal and machine parts.
Machine silk:
Round head machine tooth screw PM
Round head screw with intermedia
Large flat head screw TM
Countersunk screw km
Half countersunk head machine tooth screw OM
Big head screw BM
Thin head machine tooth screw cm
Cup head machine tooth Bolt HM
Machine Screws,Sewing Machine Screws,Slotted Cheese Head Screws,Fillister Head Machine Screw
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