The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated mm). For nuts, size will appear as diameter and pitch. There is an exception though—if pitch isn't specified, the fastener is coarse threaded. Consider this size…. M8-1.0 x 20. Important Data, Metric , Machine Screws. Position of Head: The axis of the head shall be located at a true position relative to the axis of the screw shank within a tolerance zone having a diameter equivalent to 6% of the specified maximum head diameter , or the specified maximum width across flats of hex and hex flange heads,. Metric Screw Thread Chart Metric Tap Size Tap Drill (Inches) Clearance Drill (Inches) . Outside Diameter of Screws mm inch mm inch 1.6 0.063 8.0 0.315 1.8 0.071 10 0.394 . The clearance drill sizes listed are heremonly used sizes .

Metric bolts are sized according to diameter, distance or spacing (in millimeters) between threads and length. For example a size of 12x1.75x30 translates to a bolt that is 12mm in diameter , has a distance of 1.75 between the threads and is 30mm long . 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 … Fastener and Screw / Bolt Design, Formula and Calculations. The following table chart defines standard metric external thread size M1.6 to M18 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread design.

Dec 17, 1998 Spanner (Wrench) sizes . Below heremon spanner (wrench) sizes for metric screw threads. Hex head widths (width across flats, wrench size ) are for DIN 934 hex nuts and hex head bolts . Other (usually smaller) sizes may occur for reasons of weight and cost reduction. 1-16 of over 3,000 results for Industrial Scientific: metric screws sizes metric screws sizes Cancel. Apply Filters Hide Filters. Machine Screws . Socket Head Screws . Sheet Metal Screws . Self-Tapping Screws . Concrete Screws . Wood Screws . Cutting Screws . Thumb Screws . Shoulder Screws . See more. Head Style. Metric Hex Bolt Diameters and Thread Pitches mm 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 . Length is measured from under the head to the end of the bolt Note: Head sizes may differ from what is shown due to differences between metric standards . metric - size -chart-hex- bolt

ENGLISH/ METRIC BOLT SUBSTITUTION TABLE. EQUIVALENT METRIC BOLT SUBSTITUTION – ASTM GRADE BOLT SIZES F - 568 CLASS 4.6 F - 568 CLASS 8.8 F - 588 CLASS 8.8.3 F - 568 CLASS 9.8 F - 568 CLASS 10.9 A - 325M TYPE 1 OR 2 A - 325M TYPE METRIC ENGLISH 3 (MM) (INCHES) HOLE DIAM (MM) ENGLISH - ASTM GRADE SPECIFIED.