Product Name: Carbon Steel Flat Washer for Rail Fastening Model NO.: standards Type: Track Train Certification: AREMA, BS, ASTM, UIC, TB Size: Uis6 Size1: M16 to M48 Materials: Q235 Standard Refers to: En10025, En10139 Surface Finishing: Zinc Plate, Hot DIP Galvanized Seaport: Shanghai Delivery Time: Within 30 Days Payment: Tt/ L/C Sample: Available Trademark: CW Transport Package: Gunny Bag and Wooden Case Specification: SGS, CRCC Origin: China Product Description We supply spring washer and plain washer both imports and exports.Zhongbo Railway Fastening Company is a leading Chinese manufacturer of rail fastening and rail joint bar.Zhongbo, as a specialized rail fastener manufacturer, provides a complete line of products, including rail fastening, anchor, rail joint, rail clip, rail screw, anchor bolt, rail clamp plate, rail fishplate, and fishplate bolt for connecting rail tracks.We also make rail fastenings for crane rail and elevator guide rail, along with other related products. We manufacture according to GB/TB (Chinese national standards and railway standards), AREA, UIC, BS, DIN, ASTM, and AS standards.Our products are mainly made through hot forging.The threads of rail screw spikes are made by hot rolling with special threading machines.We produce metric threads, BS, BSW, TR thread, or round threads.