Specification Brand : M & J Tooling LLC ItemName : New M30 X 3.5 6g Solid Thread Ring GAGES 30 GO NO GO P.D.'S = 27.674 & 27.462 - DW33458MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33458MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.