Specification Brand : M & J Tooling LLC ItemName : New M30 X 1.5 6H Left Hand Thread Plug GAGE 30 GO NO GO P.D.'S = 29.026 & 29.226 - DW31289MSAF ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW31289MSAF ProductDescription : YOU ARE PURCHASING THE PICTUREDLEFT HAND THREAD PLUG GAGE.