M Bolt Sizes

The "M" means "metric." Metric threads are designated by diameter and thread spacing. For instance, the most common bolt size used on bicycles is 5 x .8, also known as "M5." This size is used for water bottle mounts, cable anchor bolts, fender/rack eyelets, shifter mounts etc. The "5" means the bolt diameter is 5 mm.

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How to measure bolt size. bolt measurements can be calculated in millimeters or inches, but bolt measurements specified in inches are international. This means that should you ask for a 1/2-inch x 12 x 4-inch Grade 2 Hex Bolt Head with a 1-inch thread, the request is universally understood by bolt manufacturers.

US Bolts – Head and Wrench Sizes – Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt US Hex Bolts – Inches – ANSI/ASME B18.2.1 Dimensions of Hex Bolts – Imperial units US Hex Bolts – Metric – ANSI/ASME B18.2.3M Dimensions of Hex Bolts – Metric units

Metric bolt conversion data for industrial bolts/rods, machine screws and small diameter fasteners from Elgin Fastener Group includes metric to standard bolt conversions. The chart below shows metric bolt conversions and DIN numbers for fasteners.

WWW.HANDYMANPF.COM In this video I explain and show you how to find out what size and strength of bolt you need. Also to determine if it is metric or standard. To answer those questions like, How.

ENGLISH/ METRIC BOLT SUBSTITUTION TABLE. METRIC BOLT SUBSTITUTION – ASTM GRADE. EQUIVALENT. BOLT SIZES. F – 568. CLASS. 4.6. F – 568.

With metric threads tapping drill size is easy to work out because it is the bolt diameter minus the thread pitch so, for example, a standard pitch m16 bolt has a pitch of 2.0mm so the tapping drill size is 16 – 2 = 14mm.

8 Gauge Screw in mm Screw gauges are a measure of the head size and shaft size, and are roughly linear but not quite a 1:1 relationship (a #8 screw is a little less than twice the diameter of a #4 screw). Screws have three basic measurements: gauge, threads per inch, and shaft length in inches. So, you may also see a measurement like 6-32 x 1 1/2".