Hobson Metric Hex Coupling Nut, M10

The Hobson metric hex coupling nut comes in 4 sizes: M10 to M20; mild steel, hot dip galvanised finish. A hex coupling nut is a long hex nut used to join two threaded rods or studs end to end. These metric nuts are Grade 5.

Imperial screws and nuts use a grade for strength level and metric ones use a class, so confirm the strength level you need before ordering. HDG means hot dip galvanised.

Where this product is used

• Joining two lengths of threaded rod end to end
• Extending hanger rods for suspended services such as pipework, ducting and cable tray
• Tie-rod assemblies where a rod has to be lengthened on site
• Weather-exposed frames, sheds, carports and pergolas
• Choosing between the 4 items here: they cover diameters from M10 to M20 and lengths from 30mm to 50mm

Features

• 4 sizes: M10 to M20
• Metric thread
• Mild steel, hot dip galvanised finish
• Grade 5
• Pack quantity shown for each item
• Thick hot dip zinc coating for outdoor, structural and fencing work
• Mild steel construction

Key specifications

Choosing the right option

Choose the thread form first: the nut and its bolt or stud must match in thread form, diameter and pitch. The second figure in each size (for example 50mm in M16 x 50mm) is the nut length; choose it to suit the rods you are joining.

Hot dip galvanised parts are the usual pick for work that stays outside for years, such as structural steelwork, roofing and fencing, because the zinc coating is thick. In coastal splash zones and within about 1 km of the sea, 316 stainless is generally the better choice. Hot dip galvanised nuts are tapped oversize after the coating goes on, so pair them with galvanised bolts and put a clean, dry-to-touch lubricant on the nut threads.

Use the coupling nut on rod of the same diameter and pitch, winding each rod in until it is fully engaged in the nut. These nuts 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 Coupling Nut, Grade 5, Mild Steel, Zinc, M8 to M16, Hobson Metric Hex Coupler Nut, Class 5, Hot Dip Galvanised, M24 to M36 and Hobson Metric Hex Coupler Nut, Class 5, Zinc Plated, M6 to M36.