UNI 7689 Cross recessed raised countersunk head screws

Equivalent Standards

UNI 7689

Dimensions for UNI 7689 Cross recessed raised countersunk head screws

Thread d p a b dk f r rf x Cross Recess
No. Type H Type Z
m penetration
depth
m penetration
depth
max min nom = max min approx max max approx max approx. min max approx min max
M1.6 0.35 0.7 15 3 2.75 0.4 0.96 0.4 3 0.9 0 1.9 0.74 1.1 1.8 0.89 1.14
M2 0.4 0.8 16 3.8 3.5 0.5 1.2 0.5 4 1 1 2.5 1.1 1.4 2.4 1.04 1.35
M2.5 0.45 0.9 18 4.7 4.4 0.6 1.5 0.7 5 1.1 1 2.7 1.3 1.6 2.8 1.5 1.75
M3 0.5 1 19 5.6 5.3 0.75 1.65 0.8 6 1.25 1 3.1 1.7 2 3.1 1.83 2.08
M3.5 0.8 1.2 20 6.5 6.14 0.9 1.93 0.95 7 1.5 2 4.2 1.74 2.24 4.3 1.93 2.39
M4 0.7 1.4 22 7.5 7.14 1 2.2 1 8 1.75 2 4.5 2.04 2.54 4.6 2.26 2.72
M5 0.8 1.6 25 9.2 8.84 1.25 2.5 1.3 10 2 2 5.3 2.77 3.27 5.3 2.89 3.35
M6 1 2 28 11 10.57 1.5 3 1.6 12 2.5 3 6.8 3.03 3.53 7 3.3 3.76
M8 1.25 2.5 34 14.5 14.07 2 4 2 16 3.2 4 9 4.18 4.68 8.8 4.06 4.52
M10 1.5 3 40 18 17.57 2.5 5 2.5 20 3.8 4 10 5.38 5.88 9.9 5.28 5.74