Made of heavy 11 gauge galvanized steel that is slotted for vertical adjustment. Non-slip dimples for secure hold. Angle bracket pivots for angled or flat mounting of 2" x 6" bunk or bolster boards. Complete with nut and bolt for angle bracket. Mounts with 1/2" bolt. Bracket angle 3.5" W.

U-BOLT APPLICATION CHART
Frame Size Use Item #
2" Frame      57210
3" Frame      57220
4" Frame      57240