Genuine Unistrut P1325-EG 4 Hole 90 Degree Angle Connector Bracket for All 1-5/8" Strut Channel ANGLE FITTING  4-hole 90-degree angle fitting. FOR USE WITH - 1/2" bolt in all 1-5/8" series channels. SILVER FINISH - Electro-galvanized; ASTM B633, Type III. THICKNESS - 1/4 (6mm); 9/16" diameter hole. DIMENSIONS - 8 x 2 x 1 inches.