BECO Thread Form Dimensions Table
BECO = Bucyrus Erie Company. Thread form, pitch, height, and taper being within limits, pitch cone (pitch diameter) is generally verified by use of precision ground plug and ring gauges. Nominal standoff for plug gauge to box (female thread) seal face is flush (0.000 inch). Nominal standoff ring gauge to pin (male thread) seal face is (unlike API Spec 7 RSC connections) 0.665 inch. Gauges available from FYOU PMEC