Bolt Size and Thread Gauges

Ever wondered what size bolt, what size head, or what thread pitch you need? Not anymore. With this simple tool, you can measure most common sizes in seconds, a perfect companion for any toolbox.

Metric:

• Head Size: 7, 8, 10, 11, 13, 17, 19
• Bolt Shaft: 4, 5, 6, 8, 10, 12, 16, 18
• Thread Pitch: 0.7, 0.8, 1.0, 1.25, 1.5, 1.75, 2.0, 2.5

Standard:

• Head Size: 1/4, 3/8, 7/16, 1/2, 5/8, 3/4
• Bolt Shaft: #8, #10, #12, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4
• Thread Pitch: 32, 24, 20, 18, 16, 14, 13, 12