Reliable RzR Series PF6716MR Bulkhead Screw, #6-20 Thread, 7/16 in L, Full Thread, Modified Pan Head, Phillips Drive

These screws are made for chimneys and metal bulkheads and are designed for use with a Philips head screwdriver. These screws have a modified pan head, a self-tapping thread and a self-drilling point. They are made of zinc-plated steel.