Online Parts Store › Carriage Bolt, 3/8"-16 x 3-1/2" Image 1 of 1 Carriage Bolt, 3/8"-16 x 3-1/2" $36.78 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Blind Rivet, 1/8" x 1/4" $43.39 Phillips Tapping Screw - Pan Head, #12 x 1" $40.94 Stainless Cotter Pin $169.61 Flat Washer, 3/8", .062" Thick, OD 1" $40.34 Flat Washer, 1/4", .050" Thick, OD 1/2" (A/N Style) $11.46