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    2. DIN 2510 Flange Stud Bolts

    DIN 2510 Studs Standard

    High-Pressure Flange Stud Assemblies Engineered for Power Generation and Process Industry Service

    DIN 2510 studs define a complete bolting system for high-pressure flanged joints, covering studs, heavy hex nuts, and washers that work together as a unified assembly. These studs are engineered for high-temperature service environments such as steam turbines, boiler flanges, and critical pressure pipelines where standard fasteners would fail to sustain the required clamping load over time. Torqbolt manufactures DIN 2510 studs from EN 10269 alloy and heat-resistant steel grades, including 25CrMo4, 21CrMoV5-7, and X22CrMoV12-1, each selected based on the specific temperature and pressure rating of the application. The assemblies are completed with matching ISO 4032 nuts, and where individual stud types are required separately, DIN 939 studs and DIN 938 studs are available as standalone options with full EN 10269 material traceability.

    DIN 2510 Double End Stud Bolts with Reduced Shank Dimensions

    DIN 2510 Dimensions

    Thread d1 d2 d3 d4 d5 d6 d7 b1 b2 b3 r SW z1 max. z2 z3 z4 Centre hole
    M12 8,5 8 - - - 8 20 13 27 10 7 1,75 4 11 7 A 1,6
    M16 12 12 - - - 12 23 16 31 10 10 2 5 14 8
    M20 15 14 - - - 13 28 20 36 10 11 2,5 6 16 9
    M24 18 14 - - - 16 32 24 42 16 11 3 6 17 8
    M27 20,5 18 - - - 18 35 27 47 16 13 3 6 19 10 A 2,5
    M30 23 18 - - - 21 39 30 50 16 13 3,5 6 19 12
    M33 25,5 25 - - - 24 42 33 53 16 22 3,5 9 21 14
    M36 27,5 25 - - - 26 45 36 57 20 22 4 9 23 14
    M39 30,5 28 - - - 30 48 39 60 20 24 4 10 23 14
    M42 32,5 28 - - - 32 52 42 64 20 24 4,5 10 24 15
    M45 35,5 32 - - - 34 55 45 66 20 27 4,5 11 25 15
    M48 37,5 32 - - - 37 58 48 70 20 27 5 11 26 19
    M52 41 36 - - - 40 62 52 74 20 30 5 12 26 18
    M56 44 40 - - - 45 - 56 79 25 32 5,5 13 28 19
    M64 51 42 18 25 30 52 - 64 88 25 36 6 14 28 20 A 4
    M72 58,5 50 25 32 37 56 - 72 95 25 41 6 15 28 20
    M80 66 50 25 32 37 63 - 80 103 25 41 6 15 28 19
    M90 75 50 25 32 37 74 - 90 112 25 41 6 15 28 20
    M100 84 50 25 32 37 86 - 100 122 25 41 6 15 28 19
    M110 92,5 50 25 32 37 97 - 110 132 25 41 6 15 28 19
    M120 102 50 25 32 37 105 - 120 142 32 41 6 15 30 20
    M125 106 50 25 32 37 - - 125 - 32 41 8 15 - - A 6,3
    M140 118 65 36 43 48 - - 140 - 32 55 8 18 - -
    M150 127 65 36 43 48 - - 150 - 32 55 8 18 - -
    M160 136 65 36 43 48 - - 160 - 32 55 8 18 - -
    M170 145 65 36 43 48 - - 170 - 32 55 8 18 - -
    M180 154 65 36 43 48 - - 180 - 32 55 8 18 - -

    DIN 2510 Double End Stud Tolerance as per ISO 4759-1 Product Grade A IT13(h13)

    Nominal Diameter Range (mm) IT13 Total Tolerance (mm)
    > 1 – 3 0.18
    > 3 – 6 0.22
    > 6 – 10 0.27
    > 10 – 18 0.33
    > 18 – 30 0.39
    > 30 – 50 0.46
    > 50 – 80 0.54
    > 80 – 120 0.63
    > 120 – 180 0.73
    > 180 – 250 0.85
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