These Self Drilling Roofing Screws can be divided into different types depending on the application, materials and shape. This screw has a drill tip. In the assembly, the screw can drill the center hole by itself, and then self-drilling and tapping the thread in the hole in the carrier by means of the adjacent threaded part, so it is called self-drilling self-tapping screw. Its thread is not in use. It needs to be matched with the nut, and can be directly screwed into the base body for connection and locking.
The product is made of 410 stainless steel, which can be heat treated and has better rust resistance than carbon steel. This kind of screw makes all the drill points effectively sealed, systematically prevents excessive drilling or under-drilling, thus ensuring the quality of the installation is foolproof.
|Item||stainless steel 410 pan head self drilling screw for roof|
|Standard||DIN,JIS,GB or as customer’s requirment|
|Grade||4.8/ 8.8/ 10.9/ 12.9|
|Material||stainless steel304,316,carbon steel35#, 45#, alloy steel, brass…|
|Surface treatment||HDG, PTFE coated, plain, black, galvanized, yellow zinc plated, dacromet…|
|Packaging Details||bulk packing in cartons, then put on pallets, or as per your requests.|
|Customer design||our experienced engineer team can developed the products and manufacture in accordance with samples, drawings or only ideas|
|Price terms||FOB, CIF, CFR, EXW, and others.|
|Payment terms||T/T, L/C, western union, paypal, etc.|
|Delivery method||by sea, by air or by express service|
1. Self Drilling Roofing Screws are used for the fastening of non-metal or sheet metal materials. They do not need to be used for bottom holes and tapping internal teeth. They can be locked directly by screwing in with tools.
2. No dental swarf is released after drilling into the substrate to ensure the integrity of the material.
3. This screw meets the requirements of material chemistry, heat treatment, torsional strength, toughness and elimination of hydrogen embrittlement similar to SAE J81. Due to the need for drilling, the surface hardness and core hardness (same than the SAE J81 standard) are slightly higher.
4. In the assembly, the hole can be drilled and the thread connected to itself can be formed or cut at the same time, and the screw itself does not deform and trip.
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