265 Unit: mm Reference: Dimensions of Counterbore and Bolt Hole for the Hexagon Socket Head Cap Screws 2. L, s and g of Hexagon Socket Head Cap Screws Unit: mm H'' k H' dk D' k ds d' d2 d d d2 d' ds D' dk Nominal of Thread (d) M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 (M18) M20 (M22) M24 (M27) M30 L ℓs min and ℓg max Nominal Length min max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max ℓs min ℓg max 5 4.76 5.24 6 5.76 6.24 8 7.71 8.29 10 9.71 10.29 12 11.65 12.35 16 15.65 16.35 20 19.58 20.42 2 4 25 24.58 25.42 5.75 8 4.5 7 30 29.58 30.42 9.5 12 6.5 10 4 8 35 34.5 35.5 11.5 15 9 13 6 11 40 39.5 40.5 16.5 20 14 18 11 16 5.75 12 45 44.5 45.5 19 23 16 21 10.75 17 5.5 13 50 49.5 50.5 24 28 21 26 15.75 22 10.5 18 55 54.4 55.6 26 31 20.75 27 15.5 23 10.25 19 60 59.4 60.6 31 36 25.75 32 20.5 28 15.25 24 10 20 65 64.4 65.6 30.75 37 25.5 33 20.25 29 15 25 11 21 4.5 17 70 69.4 70.6 35.75 42 30.5 38 25.25 34 20 30 16 26 9.5 22 80 79.4 80.6 45.75 52 40.5 48 35.25 44 30 40 26 36 19.5 32 15.5 28 11.5 24 90 89.3 90.7 50.5 58 45.25 54 40 50 36 46 29.5 42 25.5 38 21.5 34 15 30 9 24 100 99.3 100.7 60.5 68 55.25 64 50 60 46 56 39.5 52 35.5 48 31.5 44 25 40 19 34 110 109.3 110.7 66.25 74 60 70 56 66 49.5 62 45.5 58 41.5 54 35 50 29 44 20.5 38 120 119.3 120.7 75.25 84 70 80 66 76 59.5 72 55.5 68 51.5 64 45 60 39 54 30.5 48 130 129.2 130.8 80 90 76 86 69.5 82 65.5 78 61.5 74 55 70 49 64 40.5 58 140 139.2 140.8 90 100 86 96 79.5 92 75.5 88 71.5 84 65 80 59 74 50.5 68 150 149.2 150.8 96106 89.5 102 85.5 98 81.5 94 75 90 69 84 60.5 78 160 159.2 160.8 106116 99.5 112 95.5 108 91.5 104 85 100 79 94 70.5 88 180 179.2 180.8 119.5 132 115.5 128 111.5 124 105 120 99 114 90.5 108 200 199.05 200.95 135.5 148 131.5 144 125 140 119 134 110.5 128 220 219.05 220.95 139154 130.5 148 240 239.05 240.95 159174 150.5 168 260 258.95 261.05 179194 170.5 188 280 278.95 281.05 199214 190.5 208 300 298.95 301.05 219234 210.5 228 Nominal of Thread (d) M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 ds 3 4 5 6 810121416182022242730 d' 3.4 4.5 5.5 6.6 9 11 14 16 18 20 22 24 26 30 33 dk 5.5 7 8.5 10 13 16 18 21 24 27 30 33 36 40 45 D' 6.5 8 9.5 11 14 17.5 20 23 26 29 32 35 39 43 48 k 3 4 5 6 810121416182022242730 H' 2.7 3.6 4.6 5.5 7.4 9.2 11 12.8 14.5 16.5 18.5 20.5 22.5 25 28 H'' 3.3 4.4 5.4 6.5 8.6 10.8 13 15.2 17.5 19.5 21.5 23.5 25.5 29 32 d2 2.6 3.4 4.3 5.1 6.9 8.6 10.4 12.2 14.2 15.7 17.7 19.7 21.2 24.2 26.7 GeneralTechnical Information Hexagon Socket Head Cap Screws
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