Blind Flange Lockout Device For Maximum Flange Width 10 3/4 in For Maximum Nut Diameter 1 7/8 in For Maximum Padlock Shackle Diameter 5/16 in For Maximum Pipe Size 12 in For Minimum Flange Width 3 3/4 in For Minimum Nut Diameter 1 in For Minimum Pipe Size 3 1/2 in Maximum Number of Padlocks 4 For Use With Pipeline Maintenance Lockout Color Black/Red/Silver Lockout Material Aluminum/Steel Standards OSHA 1910.147