BUCKINGHAM 30R-F1 Bolt hole diameter-11/16". (REPLACED THE 30-F1)
A flange that features a new, lighter, more compact design. Anchor attachment hole diameter has also been increased from 1 1/4 INCH to 2 INCH for easier connection of fall arrest/restraint devices. The 30R-F1 has a bolt hole diameter of 11/16 INCH.