Profile: Schaefer Screw Products is a manufacturer of screw machine fittings. We are an ISO 9001:2000 certified company. Our machining capabilities include milling, broaching, slotting, knurling, crimping, cross drilling, threading and stamping. We serve gas valve, refrigeration, plumbing, transportation and hydraulic industries. Our products include flared fittings, pipefittings, compression fittings and stayput hose barbs. Our products are available in a wide range of sizes and shapes.