DIN 7991 Flat Head Countersunk Socket Cap Screw Grade 10.9

Alternatives: A2 and A4 Stainless Imperial (Inch)

Flat Head Screws

10.9 Grade

Metric Coarse Thread

S025 7991-10.9 Flat Head Socket Cap

Flat Head Screws

10.9 Grade

Metric Coarse Thread

S029 7991-10.9 Zinc Flat Head Socket

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D I A M E T E R

*90° Countersink For Diameter M2 to M20 / 60° Countersink for Diameter M22 and Over

Limited Use:: Flat head countersunk socket cap screws DIN 7991 are not intended for high strength application. The purpose of producing them with a strength of the property class 10.9 is to increase the wear resistance of the sockets.
Tightening Procedure:: Insert the key into the socket and apply the torque on the nut while holding the key. Should however, the torque be applied on the screw itself it should be reduced accordingly.

R.S. Torque = Recommended Seating Torque

Property Class	10.9
Hardness (HRC)	32-39
Tensile Strength (Mpa)	835 min.