HF245IFHD HnF SKU Port (inch) A (inch) B (inch) HF245IFHD-03-03-02 3/16-3/16-1/8 0.41 0.6 HF245IFHD-04-04-02 1/4-1/4-1/8 0.42 0.64 HF252IFHD-05-05-02 5/16-5/16-1/8 0.47 0.68 HF252IFHD-06-06-04 3/8-3/8-1/4 0.58 0.93 SAE 040425