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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

Fasteners — Hexalobular Socket Countersunk Flat Head Screws

ISO 14581 - 2013

Display drawing:

国际ISO 14581 - 2013 ISO14581 14581ISO Fasteners — Hexalobular Socket Countersunk Flat Head Screws
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Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs
Default density g/cm3
×

Choose materials based on density.(g/cm3)

  • Carbon Steel 7.85
  • Stainless Steel 8.1
  • Stainless Steel 7.95
  • Stainless Steel 7.7
  • Titanium Alloy 4.5
  • Aluminum Alloy 2.8
  • Copper 8.89


Select here or enter material density on the calculation page.
Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.
Screw Thread
d
M2 M2.5 M3 (M3.5) M4 M5 M6 M8 M10
P Pitch
dk theoretical max
actual max=nominal size
min
k max
x max
Socket No.
A Ref.
t max
min
0.4 0.45 0.5 0.6 0.7 0.8 1 1.25 1.5
4.4 5.5 6.3 8.2 9.4 10.4 12.6 17.3 20
3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3
3.5 4.4 5.2 6.94 8.04 8.94 10.87 15.37 17.78
1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5
1 1.1 1.25 1.5 1.75 2 2.5 3.2 3.8
T6 T8 T10 T15 T20 T25 T30 T45 T50
1.75 2.4 2.8 3.35 3.95 4.5 5.6 7.95 8.95
0.64 0.79 0.83 1.32 1.53 1.51 1.78 2.54 2.8
0.51 0.66 0.7 1.16 1.14 1.12 1.39 2.15 2.41
Weight of per 1000 steel products(≈kg)
- - - - - - - - -
Length of Thread b
- - - - - - - - -
①,A) amax ≤ 2P ； B) amax ≤ 2.5P

Alternative history

ISO 14581 - 2013 ISO 14581 - 2022

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