Comparison of hexagon head bolts and screws
This table contains information on ISO, ANSI and DIN comparison of hexagon head
bolts and screws.
values in mm
1) The DIN 931/933 standards dated 1982/1983 are in agreement with ISO 4014/17 standards dated 1979.
THREAD LENGTH: b
(partially
threaded)
No deviations between ISO, ANSI and DIN.
For nominal length
above 125 up to 200:
No deviations between ISO, ANSI and DIN. ISO does not specify a thread
length for the sizes M 5 and M 6. Above these sizes the thread length is
identical to DIN and ANSI.
For nominal length above 200:
For the sizes M 5, M 6 and M 8 only ANSI specifies a thread length. M 10 and
above no deviation in thread length between DIN and ANSI. ISO does not
stipulate a thread length up to M 16. M 16 and above no deviation between
the 3 standards.
THREAD TOLERANCE:
All standards specify a thread tolerance of 6g before
plating, and 6h after plating. All the other geometric functions are the same
and are functionally interchangeable.
BODY DIAMETER: ds
No deviations between ISO, ANSI and DIN.