Specification Brand : M & J Tooling LLC ItemName : New 3/8 18 UNS 2A Solid Thread Ring GAGES .375 GO NO GO P.D.'S = .3376 & .3333 - DW33397MJ ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC NumberOfItems : 1 PartNumber : DW33397MJ ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDSOLID THREAD RINGGAGES.