What do you call a screwhead with just a small circle drilled into

What do you call a screwhead with just a small circle drilled into it? It's very similar to a 'spanner' screw but with only one hole. - Quora

ford - What is a screw head with a circle and 3 lines called? - Motor Vehicle Maintenance & Repair Stack Exchange

What would you call a part that would allow 2 screws to into each other from opposite ends? Is it a coupler? If so, where can I buy them? - Quora

How to remove a screw with no type of hole in the head - Quora

When using pocket screws to join two pieces of wood together, like an L shape, which side of the butted wood do you screw into? Wouldn't one way be stronger than the

How do we choose the right size of wall (rawl) plugs, screws and drill bits for masonary applications? - Quora

Unique Screw Head Types - Wilson-Garner

What is a screw with an odd shaped hole called? What do I use to remove it? - Quora

What are star-like screws? - Quora

What is 'counter sinking a screw'? - Quora

Common Fastener Heads For A Screw Or Bolt

How to remove a screw with no type of hole in the head - Quora

What is a screw with an odd shaped hole called? What do I use to remove it? - Quora

What do you call a small wooden peg that can be pushed up and down in a hole but not push all the way through? - Quora

How To Remove Stripped Screws, Broken Screw Heads And Nails - 12 Different Ways DIY Tips And Tricks!