Cavity insert This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Surface Grinding Top, Bottom and side surface ground 63 finish ends may be milled 125 finish, leave edges sharp. 29.000" (+ 0.00 - .002) Long X 2.200" (+0.00 - .001) Wide X 0.482" (+0.00 - 0.005) Thick Material is 4140 Pre-Hardened Steel 28 - 32 RC Part Part Number: M9302B Material: Material Grade: 4140 pre-hard 28-32 Rc Technical Specifications Category:Surface Grinding Dimensions0.0 x 0.0 inch Annual Usage:0.0 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 Surface Grinding: Surface grinding, commonly called flat grinding, is the process of removing extremely small amounts of material from a flat surface of a part, be it top, bottom or sides. Surface grinding is done primarily to produce fine or smooth finish surfaces. Often it is a pre-finishing treatment done to better accept coating or painting. Surface grinding is also done to achieve tight tolerances for flat, parallel or square dimensions.