Belleville Washer w/Serrated Top This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Belleville Washers Same as, or close to McMaster Carr Part # 90127A029. Must be zinc plated w/gold cad. Part Part Number: McMaster Carr Part # 90127A029 Material: Material Grade: Technical Specifications Category:Belleville Washers Dimensions0.0 x 0.0 inch Annual Usage:2000.0 Are you looking for suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) to provide manufacturing services for machine tool industry, automotive industry? For more information visit MFG.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your online quoting experience Belleville Washers: Belleville washers, or cupped spring washers, are washers with a slight conical shape which gives the washer a spring functionality. Belleville washers are typically used as springs to apply pre-load to bolted joints.