Bumax Stainless Steel Taptite (DIN7500) Screws

Hole sizes. Torque and forces for Taptite
  Material Thickness Dimensions
M3 M4 M5 M6 M8 M10
0.1-1.5 2.70 3.65        
1.51-2.5 2.80 3.65 4.60 5.5    
2.51-4 2.80 3.70 4.70 5.6 7.5 9.3
4.01-6.5 2.85 3.75 4.70 5.6 7.5 9.3
6.51-10   3.80 4.75 5.65 7.6 9.4
10.01-15       5.7 7.7 9.5
15.01-20         7.7 9.6
Breaking Torque in Nm min Bumax Hard  4.5 7.9 13 20 30 52
Standard TT 2.2 3.8 7.8 13 32 45
Tightening Torque Mv i Nm Bumax Hard  1.3 3 6 12 25 49
Standard TT 1.2 2.7 5.4 9.3 22 40

The Mv recommendations refer to burr-free surfaces lubricated with a good quality lubricant.

The Mv-recommendations are calculated assuming a coefficient of friction of 0.16 that requires a good-quality lubricant



Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.