Locking Cylinder Cap, Size 6-1/2 x 3-1/8 in, Color Yellow, Material Steel, Includes (1) Lockout Device; (1) Brass Padlock with 3 Keys, Standards OSHA 1910.147, ANSI Standard Z244, Meets DOT Standards, Neck Ring Diameter 3 1/8 in, Padlock Shackle Max. Dia. 3/8 in, Max. Number of Padlocks 1, Cylinder Lockout Pressure Type High, Thread Size 11 UNC, OSHA Compliant Yes