7/8 15/16 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 2 1 1 1/16 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 2 2 1/4 2 1/2 2 3/4 3 1.480 1.580 1.670 1.860 2.050 2.220 2.410 2.580 2.760 3.150 3.550 3.890 4.180 24 27 30 33 36 39 2 24 36 39 42 45 48 52 56 60 64 80 68 30 33 52 72 76 27 38 54 58 63 67 71 77 82 88 94 116 90 100 115 41 46 50 55 80 85 95 105 110 120 37 42 47 52 56 60 65 70 75 27 30 33 36 39 42 45 48 60 68 80 27 30 33 36 52 56 64 72 76 85 39 42 45 48 60 68 80 27 30 33 36 52 56 64 72 76 85 39 42 45 48 36 42 48 56 1 1 1/8 1 1/4 1 3/8 2 2 1/4 2 1/2 2 3/4 3 3 1/4 1 1/2 1 3/8 1 3/4 1 7/8 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 2 1 1/2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 1 1/8 1 1/4 1 3/8 1 1/2 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 1 7/8 2 2 1/4 2 1/2 3 Socket Opening 1) max-min, dimensions for metric sizes according to DIN 475/2, series 1 2) DIN 439, 555, 601, 609, 610, 917, 931, 933, 934, 935, 936, 937, 960, 961, 979, 980, 985, 986, 1587, 2510/5, 6330, 6331, 7513, 7964, 7967, 7968, 7976, 7990 3) NFE 27-311 is identical to ISO R 272 since Oct.1969 4) Standards prior to 1966 5) Only applicable to Motor industry(M 10 acc.to DIN 70 613 through 70 618) 6) Standards prior to 1963 a) Hex Flat and Hex Flat Jam Nuts Hex Nuts and Hex Jam Nuts Hex Slotted Nuts Hex Thick Nuts Hex Thick Slotted Nuts Hex Castle Nuts b) Square Nuts c) Heavy Square Nuts Heavy Hex Flat Nuts Heavy Hex Flat Jam Nuts Heavy Hex Nuts Heavy Hex Jam Nuts Heavy Hex Slotted Nuts d) Square Bolts Hex Bolts Hex Cap Screws Lag Screws e) Heavy Hex Bolts Heavy Hex Structual Bolts Heavy Hex Screws f) ANSI B 18.6.3-1962 g) ANSI B 18.6.2-1956 h) ANSI B 18.6.3-1962 ANSI B 18.2.1-1972 Square Bolt and Lag Screw only Metric sizes Thread diameters American sizes English sizes Thread Diam Nomal Series Heavy Series Nuts Nuts Bolts and Screws W BS Thread diameters German Standard minimum dimension 1) maximum dimension 2) nominal size of wrench mm Nominal Size of Wrench Whitworth Large BS 916, 1953 and BS 1083, 1968, 1965 Width across flats inch a Normal d Normal b Square c Heavy e Heavy f Machine Screws g Set Screws Square h Machine Screw Nuts Bolts Bolts Nuts Nuts Bolts Nuts Actual A/F standard hexagon small hexagon DIN...........2) DIN561+564 DIN6914+6915 Danish Stand DS 17 NFE 27-111-19303) Metric large SMS 1412 Metric small SMS 1414 Whitworth large SMS 1413 Whitworth small SMS 1415 metric Swedish Standards ISO R2721968 ISO R272-1962 French Standard SW 76.61 39.89 44.70 54.25 63.83 37.82 40.36 42.67 47.52 52.37 56.72 61.57 65.91 70.51 80.47 90.60 99.20 106.60 38.10 54.12 58.12 63.12 67.12 71.12 77.15 82.15 88.15 94.15 116.20 90.15 100.15 115.20 41.10 46.10 50.10 55.12 80.15 85.15 95.15 105.20 110.20 120.20 37.10 42.10 47.10 52.10 56.12 60.12 65.12 70.12 75.15 38.30 43.08 47.88 52.68 57.45 67.03 71.81 86.18 95.76 114.91 105.33 108.51 62.23 65.43 75.03 89.36 98.93 118.08 36.73 41.50 46.28 51.08 55.88 60.66 70.26 79.81 77.09 40.20 45.03 54.61 64.24 38.05 40.59 42.93 47.80 52.68 57.05 61.92 66.29 70.92 80.92 91.00 99.60 107.00 38.60 54.72 58.72 63.72 67.72 71.72 77.85 82.85 88.85 94.85 117.00 90.85 100.85 116.00 41.60 46.60 50.60 55.72 80.85 85.85 95.85 106.00 111.00 121.00 37.60 42.60 47.60 52.60 56.72 60.72 65.72 70.72 75.85 38.61 43.38 48.21 53.04 57.84 67.46 72.26 86.72 96.34 115.57 105.67 109.14 62.64 65.86 75.51 89.92 99.52 118.77 37.01 41.81 46.61 51.44 56.26 61.06 70.69 80.31 1 9/16 1 3/4 2 1/8 2 1/2 3 1 1/2 1 11/16 1 7/8 2 1/16 2 1/4 2 5/8 2 13/16 3 3/8 3 3/4 4 1/2 4 1/8 4 1/4 2 7/16 2 9/16 2 15/16 3 1/2 3 7/8 4 5/8 1 7/16 1 5/8 1 13/16 2 2 3/16 2 3/8 2 3/4 3 1/8 300 150 169 188 206 225 262 256 294 144 162 181 200 219 238 275 312 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 2 3/4 2 3/4 1 5/8 1 7/8 2 1/4 2 1/2 3 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 5/8 1 5/8 1 7/8 2 1/4 2 1/2 3 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 ANSI B 18.2.2-1972 of German, American, British, Norwegian, French, and Swedish sizes for Wrenches Equivalent Standard Bolt Diameters 7/8 15/16 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 2 1 1 1/16 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 2 2 1/4 2 1/2 2 3/4 3 1.480 1.580 1.670 1.860 2.050 2.220 2.410 2.580 2.760 3.150 3.550 3.890 4.180 24 27 30 33 36 39 2 24 36 39 42 45 48 52 56 60 64 80 68 30 33 52 72 76 27 38 54 58 63 67 71 77 82 88 94 116 90 100 115 41 46 50 55 80 85 95 105 110 120 37 42 47 52 56 60 65 70 75 27 30 33 36 39 42 45 48 60 68 80 27 30 33 36 52 56 64 72 76 85 39 42 45 48 60 68 80 27 30 33 36 52 56 64 72 76 85 39 42 45 48 36 42 48 56 1 1 1/8 1 1/4 1 3/8 2 2 1/4 2 1/2 2 3/4 3 3 1/4 1 1/2 1 3/8 1 3/4 1 7/8 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 2 1 1/2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 1 1/8 1 1/4 1 3/8 1 1/2 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 1 7/8 2 2 1/4 2 1/2 3 Socket Opening 1) max-min, dimensions for metric sizes according to DIN 475/2, series 1 2) DIN 439, 555, 601, 609, 610, 917, 931, 933, 934, 935, 936, 937, 960, 961, 979, 980, 985, 986, 1587, 2510/5, 6330, 6331, 7513, 7964, 7967, 7968, 7976, 7990 3) NFE 27-311 is identical to ISO R 272 since Oct.1969 4) Standards prior to 1966 5) Only applicable to Motor industry(M 10 acc.to DIN 70 613 through 70 618) 6) Standards prior to 1963 a) Hex Flat and Hex Flat Jam Nuts Hex Nuts and Hex Jam Nuts Hex Slotted Nuts Hex Thick Nuts Hex Thick Slotted Nuts Hex Castle Nuts b) Square Nuts c) Heavy Square Nuts Heavy Hex Flat Nuts Heavy Hex Flat Jam Nuts Heavy Hex Nuts Heavy Hex Jam Nuts Heavy Hex Slotted Nuts d) Square Bolts Hex Bolts Hex Cap Screws Lag Screws e) Heavy Hex Bolts Heavy Hex Structual Bolts Heavy Hex Screws f) ANSI B 18.6.3-1962 g) ANSI B 18.6.2-1956 h) ANSI B 18.6.3-1962 ANSI B 18.2.1-1972 Square Bolt and Lag Screw only Metric sizes Thread diameters American sizes English sizes Thread Diam Nomal Series Heavy Series Nuts Nuts Bolts and Screws W BS Thread diameters German Standard minimum dimension 1) maximum dimension 2) nominal size of wrench mm Nominal Size of Wrench Whitworth Large BS 916, 1953 and BS 1083, 1968, 1965 Width across flats inch a Normal d Normal b Square c Heavy e Heavy f Machine Screws g Set Screws Square h Machine Screw Nuts Bolts Bolts Nuts Nuts Bolts Nuts Actual A/F standard hexagon small hexagon DIN...........2) DIN561+564 DIN6914+6915 Danish Stand DS 17 NFE 27-111-19303) Metric large SMS 1412 Metric small SMS 1414 Whitworth large SMS 1413 Whitworth small SMS 1415 metric Swedish Standards ISO R2721968 ISO R272-1962 French Standard SW 76.61 39.89 44.70 54.25 63.83 37.82 40.36 42.67 47.52 52.37 56.72 61.57 65.91 70.51 80.47 90.60 99.20 106.60 38.10 54.12 58.12 63.12 67.12 71.12 77.15 82.15 88.15 94.15 116.20 90.15 100.15 115.20 41.10 46.10 50.10 55.12 80.15 85.15 95.15 105.20 110.20 120.20 37.10 42.10 47.10 52.10 56.12 60.12 65.12 70.12 75.15 38.30 43.08 47.88 52.68 57.45 67.03 71.81 86.18 95.76 114.91 105.33 108.51 62.23 65.43 75.03 89.36 98.93 118.08 36.73 41.50 46.28 51.08 55.88 60.66 70.26 79.81 77.09 40.20 45.03 54.61 64.24 38.05 40.59 42.93 47.80 52.68 57.05 61.92 66.29 70.92 80.92 91.00 99.60 107.00 38.60 54.72 58.72 63.72 67.72 71.72 77.85 82.85 88.85 94.85 117.00 90.85 100.85 116.00 41.60 46.60 50.60 55.72 80.85 85.85 95.85 106.00 111.00 121.00 37.60 42.60 47.60 52.60 56.72 60.72 65.72 70.72 75.85 38.61 43.38 48.21 53.04 57.84 67.46 72.26 86.72 96.34 115.57 105.67 109.14 62.64 65.86 75.51 89.92 99.52 118.77 37.01 41.81 46.61 51.44 56.26 61.06 70.69 80.31 1 9/16 1 3/4 2 1/8 2 1/2 3 1 1/2 1 11/16 1 7/8 2 1/16 2 1/4 2 5/8 2 13/16 3 3/8 3 3/4 4 1/2 4 1/8 4 1/4 2 7/16 2 9/16 2 15/16 3 1/2 3 7/8 4 5/8 1 7/16 1 5/8 1 13/16 2 2 3/16 2 3/8 2 3/4 3 1/8 300 150 169 188 206 225 262 256 294 144 162 181 200 219 238 275 312 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 2 3/4 2 3/4 1 5/8 1 7/8 2 1/4 2 1/2 3 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 1 5/8 1 5/8 1 7/8 2 1/4 2 1/2 3 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2 ANSI B 18.2.2-1972 of German, American, British, Norwegian, French, and Swedish sizes for Wrenches Equivalent Standard Bolt Diameters 325
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