Precision shoulder screws are a machined, exact tolerance, high precision screw. These screws are used in a variety of applications including precision spacing, machinery support, and motion guiding. The shoulder is machined to a tolerance of .001 to ensure unrestricted resistance in application, and both ends of the shoulder are undercut to ensure perfect seating in the application. The heads are round, and Lyn-Tron manufactures these screws with either slotted or hex drives. Our screws are machined from 303 stainless steel material, and can have a passivated finish if required.