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GB /T 68 - 2000 Slotted Countersunk Head Screws (Commen Head Style)


Unit: 毫米(mm)
Weight Calculator
L
Thread Size
d
M1.6 M2 M2.5
P Pitch
a max
b min
dk Theoretical max
Actual max=nominal size
min
k max=nominal size
n Nominal Size
max
min
t max
min
x max
0.35 0.4 0.45
0.7 0.8 0.9
25 25 25
3.6 4.4 5.5
3 3.8 4.7
2.7 3.5 4.4
1 1.2 1.5
0.4 0.5 0.6
0.6 0.7 0.8
0.46 0.56 0.66
0.5 0.6 0.75
0.32 0.4 0.5
0.9 1 1.1
per 1000 units ≈ kg(7.85kg/cm3)
- - -
Thread Length
b
- - -
①,Try not to use the specifications in parentheses
②,When L value( M1.6~M3.0 screw)≤ 30mm, full thread should be made(b=L-k-a);
③,When L value( M3.5~M10 screw)≤ 45mm, full thread should be made(b=L-k-a);
Alternative history GB 68 - 1985 GB /T 68 - 2000 GB /T 68 - 2016
Equivalent standard
GB GB /T 68
ISO ISO 2009
DIN DIN EN ISO 2009
NF NF E 25-123
Some of the above standards may be approximate equivalent. If there is any objection, the standard original shall prevail.
Suppliers
Best price if from GlobalFastener.com
  • Jiangsu BofanKe Precision Metal Technology Co., Ltd.
  • Contact: Director Tang
    Cellphone: 86-15298892886 86-15262400870
    email: syjgjsz@163.com
    Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm
  • GotopScrews International Co., Limited
  • Contact: Manager Zhuang
    Cellphone: 86-13008864675
    email: hongwei@gotopscrews.com
    Material: carbon steel, alloy steel, stainless steel, copper, aluminum, titanium; Specifications: M0.6~M6; Length: 1~60mm; Surface Treatment: galvanizing, nickel plating, zinc nickel alloy, electrophoresis, dacromet, CD grain, PVD, etc.

    I can supply
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