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    ASTM A453 Grade 660 Heavy Hex Bolts

    Class A/B/C/D

    ASTM A453 Grade 660 Heavy Hex Bolts Class A, B, C & D offered at TorqBolt are manufactured in accordance with ASME B18.2.6M, B18.6M, ASME B18.2.1, B18.2.3M standards in metric and imperial coarse and fine thread sizes with UNC, UN, UNF, UNEF, UNJF & ISO threads.

    ASTM A453 Grade 660 Heavy Hex Bolts Class

    Dimensions of Heavy Hex Bolts - ANSI/ASME 18.2.1

    Dimensions of Heavy Hex Bolts
    Dimensions of Heavy Hex Bolts

    Nominal Size E F G H LT Y
    Body Width Width Height Thread Lenght
    Diameter Across Flats Across Corners up to 6” over 6”
    min max min max min max min max basic basic max
    3/8 9,10 9,80 17,00 17,50 19,40 20,20 5,70 6,80 25,40 31,80 7,90
    1/2 12,24 13,08 21,60 22,20 24,60 25,70 7,70 9,20 31,80 38,10 9,80
    5/8 15,37 16,31 26,20 27,00 29,80 31,20 9,30 11,30 38,10 44,50 11,60
    3/4 18,52 19,51 30,80 31,80 35,10 36,70 11,60 13,30 44,50 50,80 12,70
    7/8 21,64 22,73 35,40 36,50 40,40 42,20 13,50 15,30 50,80 57,20 14,10
    1 24,79 25,96 40,00 41,30 45,60 47,70 15,00 17,80 57,20 63,50 15,90
    1 1/8 27,89 29,18 44,60 46,00 50,90 53,20 16,70 19,80 63,50 69,90 18,10
    1 1/4 31,06 32,44 49,20 50,80 59,10 58,60 19,00 22,30 69,90 76,20 18,10
    1 3/8 34,16 35,66 53,80 55,60 61,40 64,20 20,60 23,90 76,20 82,60 21,20
    1 1/2 37,34 38,89 58,40 60,30 66,60 69,60 22,90 26,30 82,60 88,90 21,20
    1 3/4 43,59 45,34 67,60 69,90 77,10 80,40 26,80 30,40 95,30 101,60 25,40
    2 49,89 51,79 76,80 79,40 87,60 91,60 29,80 35,30 108,00 114,30 28,20
    2 1/4 56,24 58,55 86,10 88,90 98,10 102,60 33,70 39,30 120,70 127,00 28,20
    2 1/2 62,51 65,00 95,30 98,40 108,30 113,60 37,60 43,40 133,40 139,70 31,80
    2 3/4 68,86 71,81 104,40 108,00 119,10 124,60 41,50 47,50 146,10 152,40 31,80
    3 75,21 78,26 113,70 117,50 129,60 135,60 46,10 52,50 158,80 165,10 31,80

    ASTM A453 Grade 660 Heavy Hex Bolts Dimensional Standards

    Bolts DIN ISO BS ASME IS
    Metric Imperial
    Heavy Hex Bolts 6914 B18.2.3.6M / B18.2.3.7M / B18.2.6M B18.2.1
    Specifications
    • ASTM A453
    • ASTM A638
    • EN 10269
    • EN 10083-3
    • ISO 3506-5
    • DIN 267
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    • MERKBLATT AD 2000 W2/W7/W10
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