These custom 316 double thread studs were manufactured domestically using 316 stainless steel material, with a combination of 1/4-28 right hand thread, 1/4-28 left hand thread, 3/8-24 right hand thread, and 10-32 right hand thread with specific tight tolerance machined shoulders specified for each part. Material certs and certificate of conformance were provided with the parts and the thread was cut rather than rolled for these parts to allow a quicker turnaround.