DIN7981 Phillips Self Tapping Screws with Crossed Recessed Countersunk Head/Countersunk Head ScrewsA selftapping screw is a screw that can tap its own hole as it is driven into it. For hard substrates such as metal or hard plastics, the selftapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a selftapping one can (within reasonable limits of substrate hardness and depth). For softer substrates such as wood or soft plastics, the selftapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed). Like the tip of a nail or gimlet, such a point forms the hole by displacement of the surrounding material rather than any chip-forming drilling/cutting/evacuating action. Products nameDIN7981 Phillips Self Tapping Screws with Crossed Recessed countersunk Head/countersunk head screwsStandard:DIN,ASTM/ANSI JIS EN ISO,AS,GBMaterialStainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L,F593Steel Grade: DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A449,FinishingZinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG),Black Oxide,Geomet,Dacroment,anodization,Nickel plated,Zinc-Nickel platedProductionProcessM2-M24:Cold Froging,M24-M100 Hot Forging,Machining and CNC for Customized fastenerCustomized ProductsLead timeBusy season:15-30days,Slack seaon:10-15daysStock ProductsSteel:4.8Grade DIN6923,8.8Grade 10.9Grade of GB5783 and GB5782Stainless steel: All DIN Standard stainless steel BoltFree Samples for standard fastenerFor more information visit:hainafastener.en.made-in-china.comService Professional Manufacturer: All of our Fastener are designed and manufactured according to buyers' specification and performance. Quality is guaranteed: Durability testing and critical technical design to enhance fasteners lifetime. Cost effective: Competitive prices with factory directly supply Perfect fastening solution with 20 years experiences to solve your problem: Wide range of parts selection. Customized Ideal Fasteners: customized services according to the samples and drawings offered. If you are not sure about what exactly you need - feel free to contact us anytime and get professional assistance from us. /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
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