Welcome to Shoreline Machine Products, Inc. threaded rod, u bolts, threaded stud, B16 stud, B7 stud, u bolt rod, all threaded rod, u bolt kits, cross tubes, spacer tubes, trailer kits Shoreline Machine Products is a well known and respected manufacturer of high-quality Threaded Rods and U bolts. Our family owned business, which is a veteran owned and operated American company, has been steadily growing for more than 40 years.