Hobson Metric Fine Hex Bolt, M20 / 40

The Hobson metric fine hex bolt range has 131 items in class 8.8, plain finish: sizes M8 to M24, with lengths from 20mm to 200mm. Class 8.8 is high tensile, and corresponds to imperial grade 5. Each size name includes its thread pitch (for example M12 x 1.5), so match the pitch of your nut as well as the diameter.

Where this product is used

• Used with a matching nut, or screwed into a tapped hole, to join or fix parts
• Hex head tightened with a spanner or socket
• Choose length and thread form to suit the parts being joined

Features

• 9 sizes: M8 to M24
• Class 8.8, Plain finish
• Lengths from 20mm to 200mm
• Pack quantity and part number for every item
• Proof load and minimum tensile strength
• Spanner size (A/F) by size

Key specifications

Choosing the right option

Choose the thread form first: the nut must match the bolt in thread form, diameter and pitch. The pitch is part of each size name: check it against your nut as well as the diameter. Length is measured from under the head to the end of the bolt.

Related hex bolts: Hobson Metric Fine Hex Bolt, Class 8.8, Zinc Plated, M8 to M24 x 20 to 300mm, Hobson Metric Fine Dome Hex Track Bolt, Grade 9, Plain, M16 to M27 x 46 to 90mm and Hobson Metric Fine Hex Bolt, Class 10.9, Plain, M12 to M30 x 30 to 200mm.