Hotchkis Sport Suspension 1707 Hardware Kit for 64-72 GM A Body Trailing Arm Mount Braces. Hardware Kit includes 1/2-13x.5.5 Grade 8 HBCS (Qty. 4) 1/2-13 Nylock Nut (Qty. 4) 1/2 AN Washer (Qty. 8). Note: Pictures are for representation only. Product may vary.