Forced under pressure into the material you’re using, Type U metallic drive screws have spaced spiral threads and a blunt tip – and while this type of screw is considered permanent, others can be easily taken out. The Winged Self-Tapper

flank angle with trilobular threads– A trilobular bodied single start thread forming screw with a 60-thread angle designed for standard performance in Nylon, Acetal, ABS, and some glass-filled nylons.flank angle with trilobular threads– A trilobular bodied single start thread forming screw with a 45-degree thread angle designed for installing into a wide variety of thermoplastics including glass-filled Nylons and modified Polyphenylene oxide. The strip-to-drive ratio, which is the ratio of stripping torque to driving torque, is used to determine the production feasibility of a fastener joint. This ratio should be around 5:1 for high-volume manufacturing with power tools. A 2:1 ratio may be acceptable with well-trained employees using consistent components and hand tools. Lubricants will dramatically reduce this ratio, hence should be avoided. Torque-turn – thread stripping (Credit:stanleyengineeredfastening.com) What is a self-tapping fastener and how can it improve the way you work? Able to tap its own hole as it’s driven into the material – be it wood, plastic or metal – the cleverly-designed component can be used in a variety of different applications.

In fact, it isn’t unusual for all the terms to be used and mixed interchangeably for any screw-type fastener that doesn’t have a flat bottom, despite the differences among them. The three types described here work in similar ways, and some specialty screws have twin or dual characteristics and functions. So, what's best when it comes to self-drilling screws? The drill point must drill completely through the material, prior to the point that the first thread starts threading into it. With several point styles available, a #2 point is typically used with light gauge materials, while a #3 is utilised for medium gauge, and a #4 and #5-point self-drilling screw is ideal for heavier materials. Drill Point – The drill point refers to the unthreaded section of the screw. When selecting the screw length, you should account for the length of material you are drilling through. If the threads engage before the drill point length is completely through the material it will result in the screw breaking Every type of plastic has unique performance difficulties, such as ductility, thermal expansion, and clamp retention. Choosing a fastener that best meets these characteristics is essential to a successful screw joint in your product designs.

Self Tapping Screws at great trade prices

How do you determine where your screw belongs in these? It’s down to the combination of point and thread style. Self-tappers are often used in sheet-metal applications where one-sided access is an issue. This might be applicable in automotive, aviation and other industries. The technology has overcome what used to be a challenge for many industries — fastening together thin metal safely with a screw. Self-tapping screws are used for a wide range of applications involving steel and aluminum, as well as alloys and mixed applications. They handle metal gauges from about 24 through 30. A self-tapping screw is designed to form its own threads as you drive it into a material such as wood, plastic or metal. In the past, you had to drill a guide hole before driving in whatever kind of screw would be used. Self-tapping screws create their own hole as pressure is exerted on them. They also provide a close, tight grip and a degree of certainty that the hole and screw fit exactly. This key difference is self-drilling screws have a tip like a drill bit, so they do not need a pilot hole. The fact that they can drill and tap their own hole into harder materials saves you using two tools, when this one component will do both jobs. Fastenright thread forming screws for plastic (FasPlas) are designed for use on thermoplastic materials, and will slice through plastic with minimal stress and low installation torque.