Machine thread grub screw:is designed to hold pieces of machinery together. Most machine thread screw require that the hole already be drilled and threaded, although there are a few types of machine screw capable of tapping their own holes. Like other screws, machine thread screw are available in a variety of shapes and sizes. Pan head machine screw are machine screws with heads that are flat on top and rounded on the sides. They're similar to oval head machine screws, which also have rounded sides; the difference is that oval head screws have a rounded top, too, as opposed to a flat top, and they have tapered bases. Both are commonly used for metal applications. Pan head machine screws can also be differentiated from flat head screws, which have flat tops, as well. However, flat head screws are tapered on the underside of the head so they can lie flush with the material they're driven into. Meanwhile, round head screws have flat bottoms with rounded heads, much like half a sphere. Round head screws can't sit flush with the material they're driven into; instead, their heads poke out like little bumps. 

DONGGUAN JINJIA HARDWARE PRODUCTS CO.,LTD. is a outstanding company with over 10-year experiences in screw manufacturing and now we have more than 100 workers. Our company is specializing in designing and manufacturing screws from M1.0-6.0, 3mm-60mm. For these years, we've gained worldwide customers' trust with our high design level, top class quality, high grade services and competitive prices, which make us become the supplier of many famous companies, like TP-link. Our company has been certified by  ISO9001-2008 management system in order to upgrade the quality control and provide you with the best quality products and the most valuable services!

Our warehouse of raw material and finished screw products stockOur usual package for set screw is as the below picture shows, or customer can do customized packaging as demands.

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