Product instruction:Features: 1) Materials:Stainless steel,Website:http://www.nbzhencheng.com, carbon steel,iron and Other Special Materials:Lucite / Nylon / Bakelite / etc. 2) Precision: According to your drawings.3) On time & short lead time4) OEM.ODM.orders are acceptable.5) Our features:Factory price+guaranteed quality+on-time delivery+best service.Place of Origin:Zhejiang, China (Mainland)Brand Name:ZCMaterial:Carbon SteelFinish:Blue Zinc PlateSurface treatment:Heat TreatingType: Plum blossom nylon HEADColor:Zinc WhitePacking:CartonItem:China FastenerApplication:BuildingPackaging Details:Small box, carton, pallet, nylon bag, for self drilling screwProduct Description1. Grade: C10222. Size: ST5.53. Length:20-100mm4. Standard: DIN 5. Certification: ISO9001, CEProduct Name:Self drilling screwMaterial: Carbon steelUsed:building industry machinery