Usually self-tapping, a screw features a helical groove wrapped around a shaft. You have to think about what materials you’ll need and what fasteners you’ll use. A Other names for an Allen key screw include Allen bolt, socket screw and Knowing when to use bolts instead of screws, or vice versa, can be a challenge until you have more experience. Please read If you want to promote your products or services in the Engineering ToolBox - please use A screw is a tapered fastener that mates with an existing thread or creates its own thread in a material as it turns.A screw without a head is sometimes called a blind screw.

Google use cookies for serving our ads and handling visitor statistics. Be sure to consider the load being put on the fastener in combination with the material when choosing between bolts and screws.Price is always a factor when budgeting a project, especially if you’re going to need a large number of fasteners. The grades are indicated on top of the bolts as raised numbers or dashes. Compared to screws, bolts can be easier to remove. We also provide same-day shipping for most orders, a safe and secure checkout and free shipping on orders over $99. Structural Screws vs. Lag Bolts: Which Are Better? Grade 2 - Low Carbon Steel - up to 3/4" proof load 55000 psi, minimum tensile strength 74000 psi - 3/4" - 1/1/2" proof load 33000 psi, minimum tensile strength 66000 psi; Grade 5 - Medium Carbon Steel, Quenched and Tempered - up to 1" proof load 85000 psi - 1" - 1/1/2" proof load 74000 psi, minimum tensile strength 105000 psi

They provide a secure grip thanks to their threads and they meet the needs of numerous do-it-yourself (DIY) projects. In comparison, screws are used to assemble objects with threads. Help from our team of experts — and access to our contractor-approved inventory and service — can make the process easier and give you more confidence as you begin your project.At Construction Fasteners and Tools, our energetic and friendly team is ready to help you find the right fasteners for your next job. They come in a variety of sizes and types for Screws are designed to be self-tapping, but in many cases you may still want to drill a pilot hole. They come in a variety of sizes and types for Bolts provide the best holding strength compared to screws and other Like screws, bolts come in many sizes and types. This bolt here which is a hot dip galvanized alloy bolt. This type of fastener works with a nut or threaded hole, which technically makes a machine screw a bolt. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your We don't collect information from our users. Only emails and answers are saved in our archive. Please read AddThis use cookies for handling links to social media. Cookies are only used in the browser to improve user experience. Remember: bolts provide a tremendous amount of holding strength whereas screws offer a middle-ground for holding power. Some of our calculators and applications let you save application data to your local computer.

However, there are several advantages and disadvantages to both of the fastener types. Tensile strength and proof loads SAE bolts. They provide a secure grip thanks to their threads and they meet the needs of numerous do-it-yourself (DIY) projects. Light to medium construction projects, like for fencing or framing, are best for screws. Because bolts offer increased strength, they work well for heavy-duty, load-bearing applications.A machine screw has threads that spiral up the entire cylinder. Some notes from ISO 898 metric screw threads standards: