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  5. DIN 7983C Hexalobular Raised Countersunk AB Self Tapping Screws

DIN 7983C Hexalobular Raised Countersunk AB Self Tapping Screws

DIN 7983C Equivalents

ISO 7051 UNI 6956 CSN 21239

DIN 7983C Hexalobular Raised Countersunk AB Self Tapping Screws
Countersunk (Flat) Head Tapping Screws With Cross Recess, Form C

DIN 7983 C Dimensions

Thread size P a dk f k r rf Cross recess Type H Type Z y
m Penetration depth m Penetration depth max.
max. nominal=max. min. approx. approx. max. approx. No. approx. min. max. approx. min. max. Type C Type F
ST2.2 0.8 0.8 4.3 4 0.7 1.3 0.8 3.8 1 2.8 1.17 1.57 2.4 1.1 1.35 2 1.6
ST2.9 1.1 1.1 5.5 5.2 0.9 1.7 1.1 4.6 1 3.4 1.81 2.21 3.1 1.83 2.08 2.6 2.1
ST3.5 1.3 1.3 6.8 6.44 1.2 2.1 1.4 5.4 2 4.6 1.89 2.39 4.3 1.88 2.34 3.2 2.5
(ST3.9) 1.3 1.3 7.5 7.14 1.3 2.3 1.5 6 2 4.7 2.04 2.54 4.4 2 2.46 3.5 2.7
ST4.2 1.4 1.4 8.1 7.74 1.4 2.5 1.6 6.6 2 4.9 2.24 2.74 4.6 2.26 2.72 3.7 2.8
ST4.8 1.6 1.6 9.5 9.14 1.5 3 1.9 8.2 2 5.4 2.7 3.2 5.1 2.69 3.15 4.3 3.2
ST5.5 1.8 1.8 10.8 10.37 1.7 3.4 2.1 9.4 3 7 3.02 3.53 6.6 2.92 3.38 5 3.6
ST6.3 1.8 1.8 12.4 11.97 2 3.8 2.4 11.1 3 7.4 3.46 3.96 7.1 3.4 3.86 6 3.6
l Type C Type F Approximate mass (7.85 kg/dm3). per 1000
units in kg
nominal min. max. min. max.
6.5 5.7 7.3 5.7 6.5 0.18 0.332            
9.5 8.7 10.3 8.7 9.5 0.24 0.44 0.721 0.888 1.07 1.53    
13 12.2 13.8 12.2 13 0.31 0.566 0.898 1.11 1.32 1.88 2.74 3.46
16 15.2 16.8 15.2 16 0.37 0.674 1.05 1.3 1.53 2.18 3.12 4
19 18.2 19.8 18.2 19   0.782 1.2 1.49 1.74 2.48 3.51 4.54
22 21.2 22.8 20.7 22     1.35 1.68 1.95 2.78 3.89 5.08
25 24.2 25.8 23.7 25     1.51 1.87 2.16 3.08 4.28 5.62
32 30.7 33.3 30.7 32         2.65 3.78 5.19 6.88
38 36.7 39.3 36.7 38             5.97 7.96
38 36.7 39.3 36.7 38           4.52 6.45 8.82