I have 18 pieces of 5 C collets, new, brand unknown, I pretty sure they came from McMaster Carr. Sizes 1/16" to 1-1/8" in 1/16" increments. They are 3-5/16" overall length, 11/16" thread length, 1-3/16" OD at start of threads. Some have some minor surface rust spots, nothing heavy. Specks on...