Thread Checker for Machine Screws & Bolts

Thread checker for identifying replacement screws for hardware.

We use this when we need to match machine screws from a handle, hinge, lock, or piece of door hardware. Instead of guessing, you can check the thread and know what screw you have — or what screw you need to order.

It also helps identify the drill bit size you need. That makes it useful when replacing missing screws or working with older hardware.

We leave ours on the bench at the shop so it is easy to grab when a mystery screw shows up.

Includes standard, metric, and drill gauges on an anodized aluminum plate.