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High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts Featured Image
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts

High Strength Grade 4.8 8.8 10.9 12.9 Black Oxide DIN7991 CSK Flat Head Hex Socket Bolts


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    High Strength Grade 4.8 8.8 10.9 12.9 Black ( (3)
    Name CSK Head hex socket bolts
    Standards DIN ISO ANC BSW JIS etc.
    Size M3-M50
    Length 15-500
    Materials Carbon Steel/Stainless Steel
    Strength level 4.8 8.8 10.9 12.9 A2-70 A4-70 A4-80
    Surface finish ZPHDGBLACKDacromet etc.
    Samples Available
    High Strength Grade 4.8 8.8 10.9 12.9 Black (1)
    High Strength Grade 4.8 8.8 10.9 12.9 Black ( (8)
    High Strength Grade 4.8 8.8 10.9 12.9 Black (
    High Strength Grade 4.8 8.8 10.9 12.9 Black ( (6)

    Product Standards

    detail7
    Hexagon socket head countersunk head screws DIN 7991
    Thread specification M3 M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
    d
    P pitch 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3
    a toll.(+2) 90° 90° 90° 90° 90° 90° 90° 90° 90° 90° 90° 60° 60°
    b L≤125 12 14 16 18 twenty two 26 30 34 38 42 46 50 54
    125＜L ≤ 200 / / / twenty four 28 32 36 40 44 48 52 56 60
    L＞200 / / / / / 45 49 53 57 61 65 69 73
    dk max = nominal 6 8 10 12 16 20 twenty four 27 30 33 36 36 39
    minimum 5.7 7.64 9.64 11.57 15.57 19.48 23.48 26.48 29.48 32.38 35.38 35.38 38.38
    ds max = nominal 3 4 5 6 8 10 12 14 16 18 20 twenty two twenty four
    minimum 2.86 3.82 4.82 5.82 7.78 9.78 11.73 13.73 15.73 17.73 19.67 21.67 23.67
    and minimum 2.3 2.87 3.44 4.58 5.72 6.86 9.15 11.43 11.43 13.72 13.72 16 16
    k maximum value 1.7 2.3 2.8 3.3 4.4 5.5 6.5 7 7.5 8 8.5 13.1 14
    s Nominal 2 2.5 3 4 5 6 8 10 10 12 12 14 14
    minimum 2.02 2.52 3.02 4.02 5.02 6.02 8.025 10.025 10.025 12.032 12.032 14.032 14.032
    maximum value 2.1 2.6 3.1 4.12 5.14 6.14 8.175 10.175 10.175 12.212 12.212 14.212 14.212
    t max = nominal 1.2 1.8 2.3 2.5 3.5 4.4 4.6 4.8 5.3 5.5 5.9 8.8 10.3
    minimum 0.95 1.55 2.05 2.25 3.2 4.1 4.3 4.5 5 5.2 5.6 8.44 9.87
    Thousand pieces of steel weight ≈kg - - - - - - - - - - - - -
    thread length b - - - - - - - - - - - - -

    About Us

    Dabang Fasteners is a wholly-owned subsidiary of Hebei Chengyi Engineering Materials Co., Ltd.
    Our parent company has 21 years experience in fastener production and is ISO9001 ISO14001 ISO45001 SGS certified.
    We focus on providing customers with competitive products that meet user needs.
    --- Factory price, saving 15-30% of the middleman price difference.
    --- exporting to 154 countries, accumulatively serving 1800+ customers, rich export experience
    --- 5000 tons in stock, up to 3000 tons per month, average delivery time 7-20 days.
    --- After-sales team of 25 people, solve all after-sales problems

    0 Risk Commitment
    --- If the product quality and packaging problems are found after receiving the goods,
    help solve the problem and unconditionally compensate the loss within 30 days.

    Our added value
    --- In China, provide you with free factory inspection services.

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    Factory Introduction

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