Stainless steel bolts are most commonly manufactured in 18-8 stainless steel (304 grade) or 316 stainless steel:
- 18-8 (Type 304): This is the most commonly used grade due to its excellent corrosion resistance and high durability. It contains 18% chromium and 8% nickel, which improves its anti-rust properties.
- 316 Stainless Steel: Often referred to as marine grade, it includes additional molybdenum, which increases its resistance to saltwater corrosion, making it ideal for marine environments or coastal applications.
Both grades are non-magnetic in their annealed state, but slight magnetism may occur after cold-working (e.g., threading or machining).