DIN 2509 Double End Studs DIN 2509 Double End Stud Dimensions b2 d Pitch b max ds b max v1 min max dp min max s min max z min nominal max min M12 1.75 21 23.5 23 25.5 13.5 12 11.82 8 7.78 7 6.82 4 4.24 3.76 M16 2 25 28 28 31 17 16 15.82 12 11.73 10 9.78 5 5.24 4.76 M20 2.5 30 34 34 37 21 20 19.79 14 13.73 11 10.73 6 6.24 5.76 M24 3 36 40.5 40 44.5 25 24 23.79 14 13.73 11 10.73 6 6.24 5.76 M27 3 38 42.5 43 47.5 28 27 26.79 18 17.73 13 12.73 6 6.24 5.76 M30 3.5 42 47 47 52 31 30 29.79 18 17.73 13 12.73 6 6.24 5.76 M33 3.5 44 49 50 55 33 33 32.75 25 24.67 22 21.67 9 9.29 8.71 M36 4 50 56 55 61 37 36 35.75 25 24.67 22 21.67 9 9.29 8.71 b2 d Pitch b ds max b max v1 min max dp min max s min max z min nominal max min M39 4 52 58 58 64 39 39 38.75 28 27.67 24 23.67 10 10.29 9.71 M42 4.5 57 64 - - 43 42 41.75 28 27.67 24 23.67 10 10.29 9.71 M45 4.5 58 65 - - 45 45 44.75 32 31.61 27 26.67 11 11.35 10.65 M48 5 64 71.5 - - 48 48 47.75 32 31.61 27 26.67 11 11.35 10.65 M52 5 68 75.5 - - 52 52 51.7 36 35.61 30 29.67 12 12.35 11.65 M56 5.5 73 81 - - 56 56 55.7 36 35.61 32 31.61 13 13.35 12.65 M60 5.5 76 84 - - 59 60 59.7 42 41.61 36 35.38 14 14.35 13.65 M64 6 82 91 - - 63 64 63.7 42 41.61 36 35.38 14 14.35 13.65 M72 6 89 98 - - 70 72 71.7 50 49.61 41 40.38 15 15.35 14.65 M80 6 95 104 - - 76 80 79.7 50 49.61 41 40.38 15 15.35 14.65 M90 6 103 112 - - 84 90 89.65 50 49.61 41 4038 15 15.35 14.65 M100 6 111 120 - - 92 100 99.65 50 49.61 41 40.38 15 15.35 14.65 Notes : P = Thread pitch (Coarse) For nominal sizes ≥ M42 long thread execution z. Z. is not customary to see scope. Not for new