Tie-down fittings ANCHOR POINT SURFACE MOUNT, HEAVY DUTY, 5,000LB ... /8" zinc plated steel pan houses a ductile iron ring Tie-down fittingsANCHOR POINT SURFACE MOUNT, HEAVY DUTY, 5,000LBFormed 1 ... ductile iron ring. Installation requires a 3-5/8" hole with 7/8" clearance below surface.Ultimate breaking strength: 5,000 ...