Hobson Metric Hex Nut, M20

There are 7 Hobson metric hex nuts (metric thread, Class 5, galvanised finish): M20 to M64. A hex nut is the standard six-sided nut. It is turned with a spanner or socket onto a bolt, stud or threaded rod of the same thread form, diameter and pitch.

These nuts are Class 5. Pitch is the coarse pitch for each diameter. Items shown as Each are single nuts; the others are supplied in the pack, box or bag quantity shown.

Where this product is used

• Securing bolted joints in fabrication, maintenance and repair
• Locking up bolted flanges and brackets, with a washer under the nut
• Use in pairs on threaded rod or studs, tightened against each other, to help resist loosening
• Choosing between the 7 items here: they cover diameters from M20 to M64

Features

• 7 sizes: M20 to M64
• Metric thread, hex nut
• Class 5, galvanised finish
• Pack quantity shown for each item

Key specifications

Choosing the right option

Match the nut to the bolt, stud or rod: thread form, diameter and pitch must all agree. Sizes are the nominal thread diameter in millimetres; compare the pitch with your bolt. Choose the class or grade to suit the bolt you are fastening, and confirm the pairing with your specification if the joint is load-critical.

Treat it as an outdoor-capable zinc coating, and check the item description for hot dip if the job depends on it, for example structural work or treated pine. Within about 1 km of the sea, 316 stainless is generally the better choice.

These are Class 5. For load-critical, structural or lifting joints, confirm the fastener against the engineer's specification. Fasteners are not lifting rated unless marked.

Related nuts: Hobson Metric Hex Nut, Class 5, Galvanised, M12, Box of 500, Hobson Metric Hex Nut, Class 5, Zinc Black Passivate, M3 to M8 and Hobson Metric Hex Nut, Class 5, Hot Dip Galvanised, M6 to M80.