1/4-20 x 3/8 Six Lobe Pan Head Internal Tooth Sems Machine Screw Fully Threaded Zinc MSW They are designed for use

They are designed for use in structural applications and feature a heavy hex head for easy installation

With their compact fillister head

and plastic into concrete

Upgrade your projects with this high-quality screw

The 100º flat head sits flush with the surface of the material being fastened

1/4-20 x 3/8 Six Lobe Pan Head Internal Tooth Sems Machine Screw Fully Threaded Zinc MSW They are designed for useThis 1 4 20 x 3 8 six lobe pan head internal tooth SEMS machine screw is a fully threaded screw made of steel and finished in zinc. It has a pan head with a six lobe drive and an internal tooth washer. This screw is designed for use in applications where a strong, secure hold is required. The internal tooth washer helps to prevent the screw from loosening over time.