Retainer This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Punching Production of a Retainer. Approximately 3.0 inch x 1.0 inch x 0.55 inch. Please see drawing for all specifications. Part Part Number: Item 4 Material: Acier inox Material Grade: 304 Technical Specifications Category:Punching Dimensions3.0 x 1.0 x 0.55 inch Tolerance:0.005Annual Usage:19200.0 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services for the machine tool industry, automotive industry… For more information visit www.MFG.com. MFG.com analyzes all engineered parts and RFQs for improved manufacturability and to ensure quality and a quick quoting experience. Punching: Punching is a fabricating process in which a steel tool, called a punch, is forced into sheet metal, forcing it to compress or release into a bottom die. Forming punches compress the sheet metal into the shape of the bottom die to create the desired contour. Hole, slot and notch punches are used to cut holes in sheet metal by shearing the metal into a hollow die, where the excess metal drops to the bottom and is collected.