Online Parts Store › Carriage Bolt, 3/8"-16 x 2-1/2" Image 1 of 1 Carriage Bolt, 3/8"-16 x 2-1/2" $23.43 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #8 x 1-1/4" $19.34 Stainless Cotter Pin 1/8" x 1-1/2" $55.55 Phillips Tapping Screw - Truss Head #10 x 1" $33.32 Nylon Insert Locknut - Stainless 5/16-18 $18.01 Carriage Bolt, 1/2"-13 x 5" $49.07