Specification Brand : M & J Tooling LLC ItemName : New 5/16 28 UN 2A Solid Thread Ring GAGES .3125 GO NO GO P.D.'S = .2883 & .2849 - DW33374MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33374MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.