About Us At Barber Machine Corp., our focus is on the manufacture of set screws sizes 2-56 thru 1/4-20. Materials include: 40L37 Alloy 18.8 Stainless Steel Aluminum Brass We will quote special set screw applications of any type. Production runs starting from 5,000 pieces.  Get in touch with us today. We are in the Buffalo/Rochester, NY area.