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  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts
  • High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN7991 CSK Flat Head Hex Socket Bolts

High Strength Grade 4.8 8.8 10.9 12.9 Yellow Zinc Plated DIN 7991 CSK Flat Head Hex Socket Bolts


  • Moq: Confirmed by product, size, grade, finish and quantity
  • Price: Quoted to specification, quantity, coating, packing and Incoterm
  • Package: Bags, boxes, cartons, pallets or customer-specified export packing
  • Export port: Tianjin, Qingdao or Shanghai, as confirmed in the quotation
  • Delivery date: Confirmed after specification, quantity and production review
  • Payment method: T/T or other terms stated in the official PI or contract
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    Product Photos and Information

    High Strength Grade 4.8 8.8 10.9 12.9 Y (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 Subject to availability and agreement
    High Strength Grade 4.8 8.8 10.9 12.9 Y (5)
    High Strength Grade 4.8 8.8 10.9 12.9 Y (4)
    High Strength Grade 4.8 8.8 10.9 12.9 Y (6)
    High Strength Grade 4.8 8.8 10.9 12.9 Y (7)

    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 - - - - - - - - - - - - -

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    Add：Dongmingyang Industrial Park, Mingguan Town, Yongnian District, Handan City, Hebei Province China

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