Union HnF SKU Thread (inch) A (inch) Hex (inch) HF212P-02-02 1/8 1.25 0.94 HF212P-04-04 1/4 1.31 1.06 HF212P-06-06 3/8 1.75 1.25 HF212P-08-08 1/2 1.79 1.56