Specification Brand : M & J Tooling LLC ItemName : New M6 X .5 6g Solid Thread Ring GAGES 6 0.5 GO NO GO P.D.'S = 5.655 & 5.574 - DW33333MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33333MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.