Specification Brand : M & J Tooling LLC ItemName : New 7/16 16 UN 2A Solid Thread Ring GAGES .4375 GO NO GO P.D.'S = .3955 & .3909 - DW38416MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW38416MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.