Specification Brand : M & J Tooling LLC ItemName : New M6 X .75 6g Solid Thread Ring GAGES 6 0.75 GO NO GO P.D.'S = 5.491 & 5.391 - DW33360MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33360MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.