Skip
 Home Product norms UNI 8112
Send your request for quotation

UNI 8112 Standard Dimensions for Thread rolling screws, pan head and cross recessed

Stock / Supplier search Send your request for quotation

Thread rolling screws, pan head and cross recessed

The standard specifies the characteristics of hexagon head thread forming screws for connections. This type of threaded connection, if the screw is not replaced, offers a good tear resistance, since the clearance between the screw and nut is equal to zero. In addition, the friction between mating parts further increases the unscrewing torque. For the preparation of the holes diameters see UNI 8108.

Dimensional Drawing and Technical Diagrams

1051_3304.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source UNI 8112

Publication date: 1993
d thread size M 2 M 2.2 M 2.5 M 3 M 3.5 M 4 M 5 M 6 M 8
P 0.4 0.45 0.45 0.5 0.6 0.7 0.8 1 1.25
D max 4 4 5 6 7 8 10 12 16
D min 3.82 3.82 4.82 5.82 6.78 7.78 9.78 11.73 15.73
k max 1.72 1.72 2.12 2.52 2.82 3.25 3.95 4.75 6.15
k min 1.48 1.48 1.88 2.28 2.58 2.95 3.65 4.45 5.85
r1 min 0.2 0.2 0.26 0.3 0.35 0.4 0.5 0.6 0.8
r2 ≈ 4 4 5 6 7 8 10 12 16
v ≈ 1.1 1.1 1.3 1.6 1.9 2 2.5 3 3.7
Z recess nr 1 1 1 1 2 2 2 3 4
m ≈ 2.11 2.11 2.9 3.15 3.91 4.29 4.7 6.73 8.46
max depth 1.42 1.42 1.78 2.06 1.93 2.34 2.74 3.48 4.17
min depth 1.17 1.17 1.53 1.81 1.47 1.88 2.28 3.02 3.71
H recess nr 1 1 1 1 2 2 2 3 4
m ≈ 2.5 2.5 2.7 3.1 4.2 4.6 5.3 6.8 9
max depth 1.4 1.4 1.6 2 2.24 2.54 3.27 3.53 4.88
min depth 1.1 1.1 1.3 1.7 1.74 2.04 2.77 3.05 4.18

Uni 8112 ≈ commercial items
d thread size M 2 M 2.2 M 2.5 M 3 M 3.5 M 4 M 5 M 6 M 8
nominal length l
4 X X X
5 X X X X
6 X X X X X X
8 X X X X X X X
10 X X X X X X X X X
12 X X X X X X X X X
14 X X X X X X X X X
16 X X X X X X X X X
20 X X X X X X X
25 X X X X X X X
30 X X X X X X X
35 X X X X
40 X X X
45 X X X
50 X X X

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.