GB/T 898 Double End Studs China Factory Reliable Supplier

Handan Haosheng Fastener Co., Ltd. specializes in GB/T 898-1988 double-end studs (bm=1.25d threaded studs), offering a fixed installed end that stays in the tapped body and a nut end for repeated assembly. Ideal for pumps, valves, machinery, cast iron bodies and pipe flanges needing periodic maintenance, our studs cover M5-M48 in steel classes 4.8-12.9 and A2/A4 stainless, resisting joint loosening through defined engagement. With plain, zinc-plated and passivated zinc finishes, drawing-based builds and ISO 9001/14001/45001 control, Haosheng’s double-end studs ensure reliable clamping.