Socket Cap Head Screws UNF Hex Allen Bolt Alloy Steel M12M14M16M18M20 Grade 12.9
Thread Diam eter - M12M14M16M18M20. Socket Cap Head Screws UNF. Thread Length - 25 to 100. Material: Alloy Steel. Grade: 12.9. which leads to the actual price may be more expensive or cheaper than the price in the link, hope you can understand.