Nut, spanner This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Slotted Nuts 2.0625-12 round slotted nut Machine shop to supply raw material, and Buyer needs to see certs before machining. Buyer has thread gages, and Buyer will do finishing and painting. Approximately 2.75 inch OD x 1.0 inch long. Please see drawing for all specifications. Part Part Number: 1493748012787 Material: Carbon Steel Material Grade: Technical Specifications Category:Slotted Nuts Dimensions2.75 x 1.0 inch Tolerance:0.005Annual Usage:165.0 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 Slotted Nuts: Slotted nuts, also called castle nuts, are hex nuts with a slightly reduced slotted cylindrical section on one end that contain linear grooves. Castle nuts are generally used in conjunction with a cotter pin to prevent loosening.