Ridges on the barrel of these inserts make them less likely to split hardwood than inserts with prongs. They're often used in wood that has been cut across the growth rings. Hammer them into a drilled hole to install. Installed length includes the flange.

Unfinished steel inserts are best for dry environments, since moisture will cause them to rust. They are ready for painting.

Zinc-plated steel inserts are mildly corrosion resistant.

Black-oxide steel inserts have a dark surface color and are mildly corrosion resistant in dry environments.

For technical drawings and 3-D models, click on a part number.