Hobson Metric Hex Bolt, M20 x 55mm

The Hobson metric hex bolt range has 3 items (Class 4.6 UTS, zinc plated): M20, in lengths of 55 to 65mm. A hex bolt has a hexagonal head and a threaded shank, and is fitted with a nut or screwed into a tapped hole. Class 4.6 is low tensile carbon steel, and corresponds to imperial grade 2.

These bolts are Class 4.6 UTS. UTS is a tensile strength abbreviation. Spanner sizes are the width across flats (A/F), using its class 4.6/8.8 column. All items are supplied as a pack of 50.

Where this product is used

• Clamping parts together through a clearance hole, with a nut on the far side
• Screwed into a tapped hole of the same thread where a nut cannot be fitted
• Fixing with a flat washer under the head or nut to spread the load

Features

• 3 items: M20, 55 to 65mm long
• Metric thread, hex head
• Class 4.6 UTS, zinc plated
• Pack quantity shown for each item

Key specifications

Choosing the right option

Choose the thread form first: the bolt and its nut must match in thread form, diameter and pitch. Metric sizes are the nominal diameter in millimetres; compare the pitch shown for each item with your nut. Length is measured from under the head to the end of the bolt, so choose size and length together. Spanner size is the width across flats of the head and nut.

Related bolts: Hobson Metric Hex Bolt, Class 10.9, Zinc Plated, M6 to M36 x 20 to 300mm, Hobson Metric Hex Bolt, Class 8.8, Zinc Plated, M6 to M30 x 16 to 375mm and Hobson Metric Hex Bolt, Class 8.8, Hot Dip Galvanised, M8 to M48 x 20 to 450mm.