b'Metric ConversionsThis catalog shows both imperial and metric measurements. In most cases, the metric dimension shown is calculated from the imperial measurement and rounded to a whole number. For example, 5/16" is generally shown as 8 mm, while an exact conversion would be 7.9375 mm. When referring to a line diameter, it is sufficient to approximate the conversion. In cases where a dimension is critical, exact metric dimensions are shown. For example, a clevis pin for a furling unit with a diameter of 1/2" is shown as 12.7 mm.Length AreaWhen you know Multiply by Tond When you know Multiply by TondInches 25.40 Millimeters Square inches 645.2 Square millimetersInches 2.540 Centimeters Square inches 6.452 Square centimetersFeet 304.80 Millimeters Square feet 929.0 Square centimetersFeet 30.48 Centimeters Square feet 0.0929 Square metersFeet 0.3048 Meters Square yards 0.8361 Square metersWhen you know Divide by Tond When you know Divide by TondMillimeters 25.40 Inches Square millimeters 645.2 Square inchesCentimeters 2.540 Inches Square centimeters 6.452 Square inchesMillimeters 304.8 Feet Square centimeters 929.0 Square feetCentimeters 30.48 Feet Square meters 0.0929 Square feetMeters 0.3048 Feet Square meters 0.8361 Square yardsWeightWhen you know Multiply by Tond When you know Divide by TondOunces 28.35 Grams Grams 28.35 OuncesPounds 0.4535 Kilograms Kilograms 0.4535 PoundsLiquidWhen you know Multiply by Tond When you know Multiply by TondLiters 0.26417 Gallons Gallons 3.7854 LitersLiters 2.1134 Pints Pints .4731 LitersTo use the online calculator for finding length, area and weight go to www.harken.comEquivalency TableFastener Types Fraction Decimal mm1/32 0.0313 .79381/16 0.0625 1.58753/32 0.0938 2.38131/80.125 3.1755/32 0.1563 3.9688HH, RH, TH,3/16 0.1875 4.7625CH and SH7/32 0.2188 5.5563measured from below1/4 0.25 6.35fastener head9/32 0.2813 7.1438FH measured5/16 0.3125 7.9375full height 11/32 0.3438 8.73133/8 0.375 9.525Hex head bolt Flat head Round head Truss head Socket head Cheese head Pan Head 13/32 0.4063 10.3188(HH) (FH) (RH) (TH) cap screw (CH) (PH) 7/16 0.4375 11.1125(SH) 15/32 0.4688 11.9063Drilling Guide 1/2 0.5 12.717/32 0.5313 13.49389/16 0.5625 14.2875Drill for Drill for Drill for 19/32 0.5938 15.0813Fastener clearance hole tapping clearance hole Drill for 5/8 0.625 15.875mm mm mm Fastener in tapping 21/32 0.6563 16.66882 2.25 1.6 6-32 9/64 #36 11/16 0.6875 17.46252.5 2.75 2.05 8-32 11/64 #29 23/32 0.7188 18.25633 3.25 2.5 10-24 13/64 #25 3/4 0.75 19.054 4.25 3.25 10-32 13/64 #21 25/32 0.7813 19.84385 5.25 4.25 1 / 4 -20 17/64 #7 13/16 0.8125 20.63756 6.25 5 5 / 16 -18 21/64 #F 27/32 0.8438 21.43138 8.25 6.75 3 / 8 -16 25/64 5 / 16 " 7/8 0.875 22.22510 10.25 8.5 7 / 16 -14 29/64 #T 29/32 0.9063 23.018812 12.25 10.25 1 / 2 -13 33/64 27 / 64 " 15/16 0.9375 23.812516 16.26 14 5 / 8 -11 41/64 17 / 32 " 31/32 0.9688 24.6063270'