Specification Brand : M & J Tooling LLC ItemName : New M6 X 1 6g Solid Thread Ring GAGES 6 1.0 GO NO GO P.D.'S = 5.324 & 5.212 - DW33339MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33339MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.