Polishing Zinc Plated Philips Head Knurled Step Screw Chuanghe Fastener Co., Ltd. Base Info Model NO.:CH-SCREW-048Trademark:ChuangHeSpecification:OEMOrigin:Dongguan, ChinaHS Code:7318 Description Pre:Precison Micro Screw Watch Screws Next:Round Head Half Thread Hand Tighten Screw