Profile: John Hassall Inc. produces custom designed pins, rivets and threaded fasteners by combining cold forming and hot forging technology with precision machining and other secondary operations. We are an ISO 9001:2000 and NADCAP certified manufacturer. We supply bushings, pins and rivets to the manufaturers of jet engines. We provide cold forming, which is a high speed manufacturing process that causes metal to flow into a variety of shapes by applying forces greater than a metal's elastic limit.