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300PCS M4.2x13mm stainless self drilling screws flat head countersunk


$31.00 $35.00
SKU: M4.2-13 SD FH

M4.2x13mm stainless self drilling screws flat head 300PCS


  At OzSupply Australia we sell online the M4.2 x 13mm Stainless Self Drilling Flat Head Screws in 300pcs. Self-drillers are also commonly called ‘Tek’ screws, a proprietary brand name associated with their unique shape and function.
 With a point “like a drill bit”, these screws create their own hole, and their own thread in one action. This is probably where the confusion with self-tappers comes in – both kinds of screws are technically self-tapping as far as the function of their threads are concerned, but the massive difference is in the function of their points. 


  • Self-drillers can be characterised as a fine thread or a coarse thread, self-tappers can’t.
  • In short, self-tappers can’t drill, self-drillers can as well as tap a thread.
  • Drill point sizes dictate drilling capacity. Common Tek point sizes are #2, #3, #4 and #5 (Series 500) – 2 and 3 most common, 4 and 5 for going through thicker metal.


  • Thread Diameter: (mm): 4.2
  • Thread Length: (mm): choose from variations
  • Head Diameter: (mm): 8
  • Drive type: Philips
  • Screw Finish: Grey
  • Screw Point Type: Self drilling
  • Screw Head Type: Flat Head
  • Pack Quantity: 300