15. Bored hole size before tapping ( for thread cutting ) Production data ■ for Metric Threads unit: mm Minor diameter of internal threads (D1) Bored hole size Minor diameter of internal threads (D1) Bored hole size Size ( ref.) Size ( ref.) Max. Min. Max. Min. M58×4 54.270 53.670 54.1 M72×2 70.210 69.835 70.1 M58×3 55.252 54.752 55.1 M72×1.5 70.676 70.376 70.6 M58×2 56.210 55.835 56.1 M75×4 71.270 70.670 71.1 M58×1.5 56.676 56.376 56.6 M75×3 72.252 71.752 72.1 M60×5.5 54.796 54.046 54.6 M75×2 73.210 72.835 73.1 M60×4 56.270 55.670 56.1 M75×1.5 73.676 73.376 73.6 M60×3 57.252 56.752 57.1 M76×6 70.305 69.505 70.1 M60×2 58.210 57.835 58.1 M76×4 72.270 71.670 72.1 M60×1.5 58.676 58.376 58.6 M76×3 73.252 72.752 73.1 M62×4 58.270 57.670 58.1 M76×2 74.210 73.835 74.1 M62×3 59.252 58.752 59.1 M76×1.5 74.676 74.376 74.6 M62×2 60.210 59.835 60.1 M78×2 76.210 75.835 76.1 M62×1.5 60.676 60.376 60.6 M80×6 74.305 73.505 74.1 M64×6 58.305 57.505 58.1 M80×4 76.270 75.670 76.1 M64×4 60.270 59.670 60.1 M80×3 77.252 76.752 77.1 M64×3 61.252 60.752 61.1 M80×2 78.210 77.835 78.1 M64×2 62.210 61.835 62.1 M80×1.5 78.676 78.376 78.6 M64×1.5 62.676 62.376 62.6 M82×2 80.210 79.835 80.1 M65×4 61.270 60.670 61.1 M85×6 79.305 78.505 79.1 M65×3 62.252 61.752 62.1 M85×4 81.270 80.670 81.1 M65×2 63.210 62.835 63.1 M85×3 82.252 81.752 82.1 M65×1.5 63.676 63.376 63.6 M85×2 83.210 82.835 83.1 M68×6 62.305 61.505 62.1 M90×6 84.305 83.505 84.1 M68×4 64.270 63.670 64.1 M90×4 86.270 85.670 86.1 M68×3 65.252 64.752 65.1 M90×3 87.252 86.752 87.1 M68×2 66.210 65.835 66.1 M90×2 88.210 87.835 88.1 M68×1.5 66.676 66.376 66.6 M95×6 89.305 88.505 89.1 M70×6 64.305 63.505 64.1 M95×4 91.270 90.670 91.1 M70×4 66.270 65.670 66.1 M95×3 92.252 91.752 92.1 M70×3 67.252 66.752 67.1 M95×2 93.210 92.835 93.1 M70×2 68.210 67.835 68.1 M100×6 94.305 93.505 94.1 M70×1.5 68.676 68.376 68.6 M100×4 96.270 95.670 96.1 M72×6 66.305 65.505 66.1 M100×3 97.252 96.752 97.1 M72×4 68.270 67.670 68.1 M100×2 98.210 97.835 98.1 M72×3 69.252 68.752 69.1 • D1: Minor diameter of 6H internal thread. Technical Information Technical-37 808