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DIN 417 Carbon Steel Slotted Set Screws With Long Dog Point

The identification of the performance level of tightening screws is denoted by a numerical value followed by the letter "H," representing hardness. The number represents 1/10 of the minimum Vickers hardness value. Within the designation of hexagon socket set screws, grades such as 14H, 22H, and 33H do not exist.

For instance, screws classified as 14H grade adhere to specific standards. When using free-cutting steel, their phosphorus, sulfur, and lead content should not exceed 0.11%, 0.34%, and 0.35%, respectively. Additionally, 14H square head set screws allow for surface hardening.

In the range of 22H to 45H grade screws, steel with a maximum lead content of 0.35% is permissible. Grade 45H alloy steel must contain chromium, nickel, vanadium, or boron as alloying elements.

In the case of 22H classification, if the specifications require a Rockwell hardness test, it should conform to specific HRB minimum and HRC maximum values.

Grade 45H screws must not exhibit a complete decarburization layer. Finally, H1 denotes the height of the external thread under maximum solid conditions.

Application:

Machine. To fasten two parts of things.

It is a screw for the relative position of the fixed parts.

DIN 417 Carbon Steel Slotted Set Screws With Long Dog Point