Specification Brand : M & J Tooling LLC ItemName : New 11/16 16 UN 2A Solid Thread Ring GAGES .6875 GO NO GO P.D.'S = .6455 & .6407 - DW33378MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33378MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.