General Tool Quick Check Thread Sizer

The Quick Check Screw Gage provides a simplistic way to identify the diameters of machine screws, bolts, wood screws, rivets and cotter pins (up to 5/16 in.). The cross-reference table matches drill bit and tap sizes, and threaded holes indicate threads per inch. There is also a 3 in. rule for measuring screw lengths. For identifying screws, bolts, rivets and common cotter pin sizes (up to 5/16 in.). Cross-reference drill bit and tap guide. Threaded holes for measuring threads per inch. Screw sizes indicated in numbers and fractions of an inch. 3 in. rule for measuring screw lengths. Made of durable engineering plastic.