Specification Brand : M & J Tooling LLC ItemName : New 3/4 12 UN 2A Solid Thread Ring GAGES .75 GO NO GO P.D.'S = .6942 & .6887 - DW33453MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33453MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.