Check the size chart from (M5 to M72) and the weight chart in KG of mild steel (MS) bolts widely used in automotive parts, HVAC installations, and electrical enclosures. Aesteiron Steels LLP is ISO certified and manufactures nut bolts, hex bolts, stud bolts, and threaded rods and exports to high-demanding countries like Germany and the Netherlands. Check MS bolt weight calculator in this link https://www.aesteiron.com/weight-chart-calculator/ms-nut-bolt-weight-calculator.html