Monster Bolts - Fastener news
Metric Bolt Grade Markings and Steel Strength Chart - MonsterBolts
Click here - Printable Metric Bolt Grade Chart (PDF)
Printable Chart for easy comparison between Metric Bolt Classes and US grades equivalents.
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Common Fastener Screw Terms explained
A quick walkthrough of the easier to understand screw fastener terms and a bit longer breakdown of some of the easier to overlook, but incredibly important items like DIN and ISO usage and Metric size and pitch for the vast majority of metric screw ranges.