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A flat washer (JIS standard) is incorporated into the pan head screw, which is most commonly used for general screw fastening. It helps prevent the hassle of installing washers or forgetting to install them, and it is effective for improving work efficiency as there is no need to worry about them falling off. The name "SEMS" comes from the registered trademark for a washer-incorporated screw developed and patented by Illinois Tool Work Company in the 1930s. Pansems also has P=2 with built-in spring washer, P=3 with built-in spring washer and flat washer (old JIS standard), P=4 with built-in spring washer and flat washer (JIS small size), etc. There is. In addition, I=3, which incorporates a flat washer (ISO standard) and a spring washer, LO-2, which incorporates a lock washer, star washer, or lock washer with an external toothed washer also known as a chrysanthemum washer into a pan head machine screw, There are also types with ± (plus-minus) shaped recesses, which can be selected according to the application. It is also popular for replacing and repairing screws in areas where machine screws and washers were previously used.
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See all 10 models in listPart Number
Pot semsProduct
Machine screw/micro screwHandling Company
Bossard Co., Ltd.Categories
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