Block BOSS
Flange Safety

Block Boss is designed to stop accidental flange closure - preventing serious hand injuries. Each Block Boss provides a choice of thicknesses for ANSI B16.48 Hydrotest blinds as well as isolation blinds. The handles are color coded for ANSI B16.5 flange classes and available in 150 lb, 300 lb, 400 lb, 600 lb, 900 lb, 1500 lb, and 2500 lb.