Hobson AS 1390 Cup Head Bolt & Nut, M6 / 20

The Hobson cup head bolt & nut is a domed-head bolt supplied with its nut, in class 8.8 with a hot dip galvanised finish. A cup head bolt has a smooth domed head with no drive, so it is tightened from the nut end. Cup head bolts are normally made with a square section under the head that holds the bolt in place while the nut turns.

Class 8.8 is high tensile, and corresponds to imperial grade 5. The product name for this range refers to AS 1390. Pack quantity changes with size and length and is shown for each item.

Where this product is used

• Fixing parts together through a drilled hole, with the nut tightened on the side away from the head
• Joints where a smooth domed head is wanted on the visible face
• Replacing a cup head bolt of the same thread, length and finish

Features

• 54 items: M6 x 20mm to M24 x 230mm
• Domed cup head, supplied with nut
• Class 8.8 strength level
• Hot dip galvanised finish

Key specifications

Choosing the right option

Choose the thread size first, then the length: the bolt has to pass through all the parts, any washer and the nut.

Related cup head bolts: Hobson Cup Head Bolt & Nut, Class 4.6 UTS, Hot Dip Galvanised, M6 to M24, Long Lengths, Hobson Cup Head Bolt & Nut, Class 10.9, Zinc Plated, M10, 40 to 65mm and Hobson Metric Cup Head Bolt & Nut, Grade 4.6, Mild Steel, Galvanised, M6 to M20.