DIN 261

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Equivalent Standards

DIN 261 T-head bolts

Dimensions for DIN 261 T-head bolts

Thread d p b db ds k n m r t
l to 120 mm l from 120 to 200 mm l over 200mm   max min Nom. Size max min Nom Size max min Nom max min approx min
M8 1.25 22 - - - 8.58 7.42 5.5 5.9 5.1 8 8.75 7.25 18 18.9 17.1 0.5 -
M10 1.5 26 - - - 10.58 9.42 7 7.5 6.5 10 10.75 9.25 21 22 20 0.5 -
M12 1.75 30 - - - 12.7 11.3 8 8.75 7.25 12 12.9 11.1 26 27 25 1 -
M16 2 38 44 - - 16.7 15.3 10.5 11.4 9.6 16 16.9 15.1 30 31 29 1 -
M20 2.5 46 52 - - 20.84 19.16 13 13.9 12.1 20 21 19 36 37.25 35.75 1 -
M24 3 54 60 - - 24.84 23.16 15 15.9 14.1 24 25 23 43 44.25 41.75 1.6 -
M30 3.5 66 72 - - 30.84 29.16 19 20 18 30 31 29 54 55.5 52.5 1.6 -
M36 4 78 84 - M12 37 35 23 24 22 36 37.25 34.75 66 67.5 64.5 2 22
M42 4.5 90 96 109 M12 34 33 26 27 25 42 43.25 40.75 80 81.5 78.5 2 22
M48 5 - 108 121 M12 38 37 30 31 29 48 49.25 46.75 88 89.75 86.25 2 22
M56 5.5 - 124 137 M16 45 44 35 36.25 33.75 56 57.5 54.5 102 103.75 100.25 3 26
M64 6 - 130 143 M16 50 49 40 41.25 38.75 64 65.5 62.5 115 116.75 113.25 3 26
M72 x 6 6 - - 169 M16 55 53.8 45 46.25 43.75 72 73.5 70.5 128 130 126 4 26
M80 x 6 6 - - 185 M20 65 63.8 50 51.25 48.75 80 81.5 78.5 140 142 138 4 33
M90 x 6 6 - - 205 M20 70 68.8 55 56.5 53.5 90 91.75 88.25 155 157 153 4 33
M100 x 6 6 - - 225 M20 80 78.8 62 63.5 60.5 100 101.75 98.25 170 172 168 5 33