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Stainless steel hexagon socket set screws DIN 913-914-915-916. What type of standard indications to be followed?


The quality of hardness test

Hexagon socket set screws with flat point are available in our range both in stainless steel AISI 304 that AISI 316. These screws have a specific characteristic which they are to be “headless“. For this  typical characteristic the quality tests do not provide for the measurement of resistance.

Therefore all our manufacturers follow the ISO 3506-3 with class 21H.

The table about proof torque requirements       

You can show below the table concerning the proof torque requirements. (See table nr. 3)

The hardness class and the different test method

Hexagon socket set screws must meet specific hardness requirements. We report below the hardness table (See table nr. 4) with hardness class and the different test method to use. 


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