Engine Stud Bolt OE 612600114385 — WEICHAI Diesel Engine Fastener for SINOTRUK HOWO Heavy Trucks The Engine Stud Bolt OE 612600114385 is a precision-engineered assembly fastener designed for WEICHAI heavy-duty diesel engines, including those fitted to SINOTRUK HOWO heavy trucks. Supplied as part of our Weichai Fasteners & Small Parts range, this component is manufactured to meet the demands of commercial truck engine assembly and repair. Key Specifications OE / Model No.