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. Drill point sizes dictate drilling capacity.In short, self-tappers can’t drill, self-drillers can as well as tap a thread.Self-drillers can be characterised as a fine thread or a coarse thread, self-tappers can’t.Made from stainless steel to resist galvanic corrosion, use these screws to fasten aluminum to aluminum and steel framing. These 410 stainless steel screws are more corrosion resistant than ultra-corrosion-resistant coated steel screws. Rounded Head Drilling Screws for Aluminum. Below are multiple fraction calculators capable of addition. 100PCS 10 x 1-1/2' (3/8' to 2' Available) Flat Head Sheet Metal Screws Phillips Drive Wood Screws, 304 Stainless Steel 18-8, Self Tapping. Stainless Steel Flat Head TappingScrews for Concrete, Block, and Brick. 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. 56 X 1 22-56 x 1/8 Flat Head Slotted Machine Screws Stainless Steel 18-8 Qty 100 Brand New 10. These Flat Head screws have a point “like a drill bit”, these screws create their own hole, and their own thread in one action. At OzSupply Australia we stock the M4.2x 38mm Stainless Self Drilling Flat Head Screws in 50/300pcs.Self-drillers are also commonly called ‘Tek’ screws, a proprietary brand name associated with their unique shape and function. Precision Flat-Head Stainless Steel Screw - 8 x 1-in - Self-Tapping - Square Drive. 316 stainless steel countersunk screw and m3 m3.5 m4 m6 m7 SS csk screw: US 0.03-US 0.42/ Piece: stainless steel raised head countersunk screw, pozi drive chipboard screw: US 0.005-US 0.015/ Piece: self drilling SS countersunk decking screw: US 4.70-US 5. Self Drilling Stainless Steel Screws Flat Head M4.2x38mm 50PCS/300PCS Precision Flat-Head Stainless Steel Screw - 8 x 1-in - Self.
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