Metric flange bolts, Partial thread, Class 10.9 steel plain finish, 12mm x 1.75mm
Flange bolt length is measured from the bottom of the flange to the end of the bolt.
These bolts are all partially threaded. Shorter lengths are found with full thread.
Full thread, including shorter lengths.
Flange bolts have a flange on the bottom of the head that distributes the load like a washer.