METRIC THREAD ROLLING SCREWS
This SAE standard covers requirements for metric thread rolling screws suitable for use in general engineering applications.
Requirements for three material-process options are stated:
a. Screws (in sizes M2 x 0.4 thru M12 x 1.75) manufactured from low carbon steel, carburized, and tempered. These screws are designated SAE J1237 Type 2.
b. Screws (in sizes M2 x 0.4 thru M12 x 1.75) manufactured from medium carbon alloy steel, heat treated to achieve properties comparable to SAE J1199 class 9.8 screws, and additionally, with the point selectively hardened. These screws are designated SAE J1237 Type 9.
c. Screws (in sizes M5 x 0.8 thru M12 x 1.75) manufactured from medium carbon alloy steel, heat treated to achieve properties comparable to SAE J1199 class 10.9 screws, and additionally, with the point selectively hardened. These screws are designated SAE J1237 Type 10.