CapGrip This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Milling & Turning 2.875 OD x 1/4' thick steel disc with 76 (.060) equally spaced circular cuts slotted into inner diameter. material: 4140 Prehard. Two pieces required to prove out design the will be a wear change part. 3D CAD files are avilable. Please see drawing for all specifications. Part Part Number: Or011719-1 Material: Alloy Steel Material Grade: 4140 Prehard Technical Specifications Category:Milling & Turning Dimensions2.875 x 0.25 inch Tolerance:0.005Annual Usage:10.0 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your quoting experience Milling & Turning: Milling and Turning, or CNC milling and turning will fall in this process, or manual milling is the process used to produce prismatic components. A rotating cylindrical cutter with multiple flutes, commonly called an endmill, traverses along multiple axes to machine features such as slots, pockets and profiles. Turning, CNC turning, or manual turning is the process used to produce cylindrical components. A cylindrical piece of stock is rotated and a cutting tool is traversed along 2 axes of motion to produce precise diameters and depths.