company attend the professional exhibition

Similarities and Differences What’s most similar about these two types of screws is that both form threads as they penetrate the material being worked with. Both attach steel on steel and steel on wood when rivets or nuts and bolts cannot do the job. Between these two, however, self-drilling screws offer two distinct advantages: time and costs saved at assembly time, and reduced error in installation, which often happens if one pre-drills holes in the wrong size.

Why Choose Delong Company for your Self Drilling Screw, Drywall Screw, Chipboard Screw and Washer

Do you know the difference between blackening and black phosphating of drywall nails?

Metal washers are used to provide a tight seal between two surfaces in various applications. They are typically used in the oil and gas industry, automotive industry, and power plants. The main purpose of metal washers is to prevent leakage and maintain the integrity of the system.

The Function of Spring Washers and How to Choose between Spring Washers and Flat Washers?The function of the 

Spring washer, also known as elastic washer, is a thin gasket used to absorb and disperse pressure between the connecting piece and the workpiece. Spring washers are usually made of elastic alloy materials and can have excellent properties such as high elasticity, high strength, vibration resistance, and corrosion resistance.

When it comes to fasteners, ensuring stability and security is crucial. Lock washers play a vital role in preventing fasteners from loosening due to vibration, rotation, or other external forces. In this article, we will explore lock washers, their types, functionality, advantages, and the different applications where they are indispensable.

 For large metal projects a metal roof screw gun is a life saver as it truly is the right tool for the job.  For smaller projects a cordless drill/diver will work just fine.  Ideal speed range for cordless drill will be under 2,500 rpm and a variable clutch is highly recommended.  You might find lower speeds helpful when drilling into thicker metal and when using Stainless Steel screws to lessen the heat generated from the drilling process and avoid ‘burning’ the self-drilling tip.  Use of a variable clutch makes it possible to achieve a consistent drive without over tightening.  This is doubly important in dealing with roofing screws as they need to be correctly tightened so the EPDM sealing washer is compressed without squeezing out of the sides.

Self-drilling screws are a great tool for quickly and securely joining materials together. They eliminate the need for pre-drilled pilot holes, which makes them incredibly convenient to use in any application. From softwoods to hardwoods, metal to plastic - self-drilling screws can handle it all! This article will explore what self-drilling screws are, why they are used, and how to use them in various materials.

A self-tapping screw forms its own hole and taps its own thread as it is driven into various, different materials. Self-tapping screws are available in just about every type of screw head design available in the market. The most common being the Phillips or slotted head. The tips and threads of self-tapping screws come in a vast array of patterns, depending on the application required.Self-tapping screws are ideal for applications where an item needs regular maintenance and needs constant disassembly and reassembly.  

Tek screws or self-drilling screws come with an additional pair of bladed flutes which extends from the threaded portion of the body all the way to the drilling tip.  The purpose of this is to combine the drilling and tapping function onto the same screw, thus eliminating the need to pre-drill pilot holes and tap threads.  Drill, tap and fasten are completed in one go, saving time and money.  The best Tek screws come with various types of surface treatments to cope with the environment and provide weathering resistance to itself and the fastened substrate.Tek screws are popular for many general sheet metal applications like roofing, cladding, and HVAC, etc.Larger Tek screws (No.3 Tek and above) are strong enough to penetrate 12~20-gauge galvanized steel, as well as 3/8” to ½” (10~12.5 mm) structural steel and can be used on various civil and naval engineering applications.

Understanding the way to use self drilling screws is comparatively straightforward. These screws are simple to control once you recognize the fundamentals, yet accuracy continues to be important to keep up a top-quality finish and well-completed task.In the best way of using a self-drilling screw, you will create pilot holes, which can ensure your screw is aligned to the opening perfectly. The pilot hole should be slightly smaller in diameter than the diameter of the screw. Instead, the screw’s thread will not be ready to catch effectively.

First, decide on the correct type of screw for the desired substrate to be fastened. Mark the precise position where the screw will be used and ensure you have ample room to use a screwdriver or drill machine.Usually, it helps, but is not always necessary, to drill a pilot hole slightly smaller in diameter than the actual screw size. This allows for the screw body to fill the drilled cavity and the threads to cut into the material as it is screwed in. Be careful to use a drill bit slightly smaller than the self-tapping screw, otherwise, the threads won’t have anything to bite into as it turns in.Position the screw straight in line with the hole and turn it in, one or two turns, by hand. This allows the screw to be left in the hole as you pick up your screwdriver or drill machine. Using firm short movements, screw the self-tapping screw in place using a Phillips or flat head screwdriver or drill bit. Ensure that the self-tapping screw goes in straight, and do not over-tighten it as this could cause the head to strip.

Self-tapping screws are designed to cut their own screw threads as they are screwed into a material. There is no need to create a screw thread in a pre-drilled hole as the self-tapping screw does the work as it is screwed in.Self tapping screws are generally made from carbon steel or stainless steel in a variety of screw types such as pan head and countersunk. There are also specialist types such as self tapping screws specifically designed for use in concrete, brick or mortar.

As any DIYer knows, a job is half the battle with the appropriate tools. We’ve all suffered the frustration of rummaging through the toolbox for the right drill bit or screwdriver in a bid to save time and ensure the best possible finish for our hard work. And aside from your standard tools, having the proper fasteners is critical for any project that requires the joining of materials. Self-drilling screws are a mighty addition to your screw collection to reduce preparation time, speed up installation times, and cut down on tool costs. They are unique in design and are one of the most accessible screws to work with for multiple applications and projects. Now, you’re probably wondering how self-drilling screws work compared to other screws. In this article, we cover the self-drilling screw-in detail so you can make the most of the many benefits it brings to home DIY.

Self-drilling screws are a type of fastener that can drill and tap its hole in a single operation. This makes them ideal for use in applications where it is difficult or impossible to drill a pilot hole first, such as fastening sheet metal to wood or other surfaces. Self-drilling screws have a sharp, tapered tip that cuts through the material it is being fastened to. The screw then threads itself into the material, creating a secure hold.Self-drilling screws are a convenient and versatile way to fasten materials together with many advantages such as:They are easy to use and save time (no need to drill a pilot hole first & no screwdriver needed).They are versatile – they can be used to fasten a variety of materials together(they can be coated with zinc or nickel to protect them from rust or corrosion).They are durable. They can withstand a lot of wear and tear.They are affordable. They are a cost-effective way to fasten materials together.

We're a company that specializes in the manufacturing, supply and exporting of screws which are used for many different applications, including mechanical and electrical engineering. Our goal is to help our customers achieve their goals by providing the best possible solutions for their needs. We're constantly producing new prototypes and tools to keep up with the ever-evolving market.

SS Truss Head Screws are specially designed for wood, plastic or metal. As these are manufactured from stainless steel the rust resistance is high. Corrosion resistance is excellent in chemical, marine and other corrosive areas. Specifications of this may include stainless steel, head diameter is 0.384”, thread size is #8, requires full thread and drive style is #8 Philips screwdriver. SS coach screws also known as lag screws or lag bolts. These are used in construction and other landscaping applications. Its size range from M1.6 up to M24 and length is 5mm to 20mm.

Understanding Discount 1 Flat Washer Dimensions A Comprehensive GuideIn the world of hardware and