M5 x 20mm Low Head Cap Screws (DIN 7984) - A2 Stainless Steel: Accu.co.uk: Precision Screws
measuring - Does the outer diameter of 4.78 indicate an M4 or an M5 bolt? - Home Improvement Stack Exchange
M5 (5mm) A2 Stainless Steel Hexagon Left Hand Thread Full Nuts Hex Reverse Nut - 10 Pack : Amazon.co.uk: DIY & Tools
TR knowledge base | Thread geometry - metric coarse
50pcs/lot Metric M5 304 Stainless Steel A2 Button Head Hex Socket Cap Screw Bolt Iso7380 - Bolts - AliExpress
Get to Know Metric Bolt Sizes - Insight Security
Metric Blue UST187461 | Socket Cap Screw, Flat, M5-0.80 Thread Size, 12 Inch Length, 25Pk | 5YMP4 | Raptor Supplies Worldwide
50pcs/Lot Metric Thread DIN912 M5x6 mm M5*6 mm Black Grade 12.9 Alloy Steel Hex Socket Head Cap Screw Bolts - AliExpress
Black Oxide Alloy Steel Flat Screw, Hex Socket Drive, M5-0.8 Thread Size, 30 mm Length, Fully Threaded, US Made (Pack of 100) : Amazon.co.uk: DIY & Tools
ISO metric screw thread - Wikipedia
Steel Thread Rolling Screw for Metal, Zinc Plated, Pan Head, Star Drive, Metric, M5-0.8 Thread Size, 10 mm Length (Pack of 100) : Amazon.co.uk: Sports & Outdoors