Vermont Custom Hex Plug Gages - GO / NO GO - Various SizesVermont Custom Hex Plug Gage Assemblies Select Specific Hex Size from Pull Down Menu. Features include Manufactured to ASME B18. 3 Specifications Each Assemble includes a GO and NOGO segment When it comes to ensuring the precision and reliability of your machine head fasteners, accurate GO NOGO Hex Plug Gages are a crucial aspect. Meticulously crafted to adhere to the stringent standards set by ASME B18. 3 specifications, these precision tools are