Full Thread Bonded Washer Bi-Metal Screws Stainless Steel SUS304

Our AdvantagesProduct Description   NameBi-metal Self-drilling ScrewsSize4.8, 5.5, 6.3mmDrill Point#1, #2, #3 #5MaterialSUS304+SCM435HeadHex WasherThreadFull ThreadWasherSUS304+EPDMWasher SpecificationE14, E15, E16, E19 and etcSurface TreatmentChrome, Ruspert, Decromet, etcApplicationSolar Mounting and OutdoorBrandUnionCertificationETA, ISO, BSCIOriginChinaBi-metal ScrewsBi-metal screws sometimes referred to as twin-fast screws, are made of two separate metals joined together. They have a carbon steel core and stainless steel exterior. Carbon steel provides strength while stainless steel provides corrosion resistance. This makes bi-metal screws ideal for use in outdoor applications like solar power systems and roofing.Bi-metal screws are hardened through heat treatment to maximize their toughness and resistance to stripping and breaking. They can withstand high torque and grip well into materials like wood and metal. Their unique composition gives them excellent resistance to rust and corrosion compared to regular carbon steel screws.Uses for Solar MountingFor solar panel installations, bi-metal screws are commonly used to secure:Rails and brackets to the roof surfaceFrames that hold panels togetherJunction boxes and conduitsPanels to racks and framesTheir threading grips tightly, while their stainless steel exteriors eliminate rust stains on the roofing materials. Bi-metal screws also hold up well to thermal expansion and contraction of the roof.The combination of strength and corrosion resistance makes bi-metal screws well-suited for roofing needs. They help roofs stand up to sun, rain, snow, and wind. Their versatility allows use with many roofing materials like asphalt shingles, slate, metal sheeting, and more.Corrosion ResistanceStainless steel combined with a carbon steel core gives bi-metal screws excellent resistance to rust and corrosion. The stainless steel exterior protects against oxidation, allowing long-term outdoor use.Bi-Metal SpecificationSpecificationDiameter(mm)Length(mm)Thread SizeDrill Point4.825-22016#1, #2, #3, #55.525-30014#1, #2, #3, #56.319-30014#1, #2, #3, #56.3/5.525-5014#1, #2, #3, #56.3/5.560-300Double ThreadBi-Metal Coating  Surface TreatmentTypesClass2Class3Class4DacrometCoating MaterialMechanical GalvanizedMechanical GalvanizedMechanical GalvanizedZinc and AluminumSalt Spray Test 500Hours1000Hours2000Hours1000HoursReport ResultProduct ApplicationCompany ProfileQuality ControlCertificationsFAQ/* 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