Hillman 1/2 In. x 3-1/2 In. Grade 2 Zinc Carriage Bolt (25 Ct.) Vacuums & Carpet Cleaners The Pen blade is great

The Pen blade is great for light work

Can be rotated after installation

Consult a plumber

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Hillman 1/2 In. x 3-1/2 In. Grade 2 Zinc Carriage Bolt (25 Ct.) Vacuums & Carpet Cleaners The Pen blade is greatCarriage bolts are designed to fasten a wooden face to either a wood or metal frame. Its flat head is designed to eliminate the need for a washer and provide a semi flush finish to applications. The square underside of the head is self locking to eliminate spinning and the need for a driving tool. The zinc plating is rust resistant and provides a beautiful, consistent finish, but, may not work for all exterior projects.