Hobson KBC46GCM060100 M6 x 100mm Cup Head Bolt & Nut, Hot Dip Galvanised

The Hobson cup head bolt & nut on this page is a domed-head bolt supplied with its nut, in class 4.6 UTS with a hot dip galvanised finish. It lists 49 items, from M6 x 100mm to M24 x 550mm, each sold as a box or pack of the quantity shown in the table.

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.

Hobson lists class 4.6 as low tensile carbon steel, and its class and grade chart pairs class 4.6 with imperial grade 2 (manufacturer-stated).

The supplier names these bolts Class 4.6 UTS. The Hobson acronym list includes UTS as a tensile strength abbreviation (manufacturer-stated).

The Hobson strength table does not list class 4.6, so no strength figure is published for these items.

The pitch shown for each size is the coarse pitch given in the Hobson thread table (manufacturer-stated).

Pack quantity changes with size and length and is shown for each item. Head diameter, neck size and thread length are not stated in the supplier data used for this page, so check them if they matter for your joint.

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

• 49 items: M6 x 100mm to M24 x 550mm
• Domed cup head, supplied with nut
• Class 4.6 UTS strength level
• Hot dip galvanised finish
• Pitch shown for each size, from the Hobson thread table (manufacturer-stated)
• Pack quantity shown for each item

Common specifications

Key specifications

Selecting 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. The length in the table is the length the supplier gives; for a cup head bolt it is normally measured from under the head to the end of the bolt. Metric sizes are the nominal diameter in millimetres; compare the pitch in the table with your nut.

Related products

Related cup head bolts: Hobson Cup Head Bolt & Nut, Class 8.8, Hot Dip Galvanised, M6 to M24, Hobson Metric Cup Head Bolt & Nut, Grade 4.6, Mild Steel, Galvanised, M6 to M20 and Hobson Cup Head Bolt & Nut, Class 4.6 UTS, Zinc Plated, M6 to M12.