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”). The cross-reference table matches drill bit and tap sizes, and threaded holes indicate threads per inch. There is also a 3” rule for measuring screw lengths.

• For identifying screws, bolts, rivets and common cotter pin sizes (up to 5/16”).
• 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” rule for measuring screw lengths.
• Made of durable engineering plastic.