Check the listing for details. #30 Threaded Collet (1/4" x 28). Condition: New. Listed at 3.75 USD. The #30 threaded collet, measuring 1/4" x 28, is a crucial component in CNC, metalworking, and manufacturing industries. Designed for workholding and toolholding, this collet chuck is essential for securely clamping and centering workpieces in lathes and milling machines. Its durable construction and precise threading ensure a reliable and stable grip on the workpiece, providing accuracy and efficiency in machining processes.