Headed Products | Special Manufacturing Headed Products Highland Threads, Inc. is a leader in the production of hot-formed bolts and nuts in the U.S. Our manufacturing plant yields enormous quantities of these products daily in diverse applications, customized to exact specifications, quickly and accurately. Application processing is virtually limitless. Back To Top Special Manufacturing Special and custom parts are readily manufactured from blue prints either provided by the customer, or generated at Highland Threads. Our complete design and tooling systems result in the consistent ability to meet production schedules and specification requirements Back To Top