Online Parts Store › Carriage Bolt, 1/2"-13 x 4" Image 1 of 1 Carriage Bolt, 1/2"-13 x 4" $109.86 Hot Dipped Galvanized. Add To Cart Added! Hot Dipped Galvanized. You Might Also Like Phillips Tapping Screws - Oval Head, #12 x 1-1/2" $30.55 Lock Washer, M4 $10.20 Phillips Tapping Screw - Pan Head, #8 x 5/8" $18.01 Phillips Tapping Screw - Pan Head, #8 x 1" $21.73 Carriage Bolt, 1/2"-13 x 5" $49.07