Proven strength through testing

All Flowdrill connections are tested according to DIN EN ISO 898-2 and VDI 2230-1 to measure both pull-out strength and tightening torque.
Tests on mild steel (S235) and stainless steel (AISI 304) show that Flowdrill threads meet or exceed the performance of ISO grade 6, 8, and 10 nuts, even in thin-walled materials from 1.0 to 4.0 mm.

Results:

Thread size	Thread size	Pull-out force (kN)	Tightening torque (Nm)	Equivalent ISO nut class
M6	2 mm mild steel (S235)	≈ 19.4 kN	≈ 16 Nm	ISO Class 8
M8	3 mm mild steel (S235)	≈ 43 kN	≈ 40 Nm	ISO Class 10
M10	4 mm mild steel (S235)	≈ 71.8 kN	≈ 100 Nm	ISO Class 10
M12	4 mm mild steel (S235)	≈ 98 kN	≈ 145 Nm	ISO Class 10

For individual thread sizes or reports, please provide in your material thickness, type of material and thread size, with this information we can use our database of previously tested threads.

In-house testing services

If your material or dimensions are not yet tested, Flowdrill offers full in-house validation for your quality department.

Sample testing

• HAAS TM1P vertical machining centre (6 kW)
• Bridgeport milling machine (3 kW)
• Six pillar drills, capacity up to 6 kW

Pull-out testing

• Hegewald & Peschke universal testing machine – up to 100 kN (DIN EN ISO 898-2 / 6892-1)

Torque testing

• HS Technik Torqbee TBAECO-85-5 (30–85 Nm)
• Manual testing up to 200 Nm

Shear testing

• Hegewald & Peschke universal testing machine – up to 100 kN