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To save users assembly time, SEMS screws, also known as SEM screws, are machine screws with lock washers already attached. They integrate two distinct components into a single, inexpensive, pre-assembled fastener. SEM fasteners' washers behind the head enable quick installation, durability, and simple application flexibility. There is no need to be concerned about the washer disappearing when using SEMS machine screws, which helps to prolong product life and guarantee dependable operation.
There are many types of standard strength classifications for combination screws, but generally only two are used in the market, one is 4.8-level combination screw strength, and the other is 8.8-level combination screw strength. In the market, 4.8-level combination screws are the most used in terms of customer demand and have a wide range of applications. As for the standard strength of 8.8-level combination screws, we generally refer to 8.8-level hexagon combination screws, 8.8-level pan head combination screws, and 8.8-level external hexagon combination screws. These three are more commonly used.

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About us
Haiyan Gete Hardware Co.,Ltd
Haiyan Gete Hardware Co.,Ltd is a top-rated manufacturer and supplier of fastener products. Our product line ranges including standard fasteners (such as bolts, nuts,screws,studs and anchors) and non-standard parts which customize according to the drawings from the customers .If you're in need of top-quality fasteners, Contact us today to learn more about our products and services.

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