Legend:
b – length of the thread (at least)
l – length of bolt
d – the nominal diameter of the thread
k – head height
r – radius
dk – head diameter
m – groove width
a – length undercut
x – thread run
da – diameter of the screw shank
Makings:
Steel: 4.8,5.8
Stainless: A2
Plastic: –
Non Ferrous: –
Thread: 6g
Table according to ISO 7048:
thread d | M2,5 | M3 | M4 | M5 | M6 | M8 |
a max. | 0,9 | 1 | 1,4 | 1,6 | 2 | 2,5 |
b min. | 25 | 25 | 38 | 38 | 38 | 38 |
dk max. | 4,5 | 5,5 | 7 | 8,5 | 10 | 13 |
da max. | 3,1 | 3,6 | 4,7 | 5,7 | 6,8 | 9,2 |
k max. | 1,8 | 2 | 2,6 | 3,3 | 3,9 | 5 |
r min. | 0,1 | 0,1 | 0,2 | 0,2 | 0,25 | 0,4 |
x max. | 1,1 | 1,25 | 1,75 | 2 | 2,5 | 3,2 |
m | 1 | 2 | 2 | 2 | 3 | 3 |