These are our strongest stainless steel screws and are frequently used to secure items in engines and turbines. They have the corrosion resistance of 18-8 stainless steel and strength comparable to alloy steel. Screws don't conduct electricity. Under the head, the length is measured.
If you are unsure of the pitch or threads per inch, go with screws with coarse threads, which are the industry norm.
Screws that adhere to ISO 4762 (formerly DIN 912) and Fed. Spec. FF-S-86 meet dimensional standards requirements.