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R_H SEMS BOLT M3 ~ M8The sems bolt is a bolt with a flat washer, a spring washer, etc.
That improves adhesion and enables efficient operation.Detailed Information Material S45C(8.8), SS400, SCM435, SUS304, SUS316 Coating zinc-plated(yellow, white, black, whisker), GEOMAT, hot dipping Size M3, M4, M5, M6, M8, M10, M12, M16