Hobson KBHK0GCM120030 M12 x 30mm K0 Structural Assembly, Class 8.8, Hot Dip Galvanised

The Hobson K0 structural assembly on this page is supplied in class 8.8 with a hot dip galvanised finish. It lists 223 items, from M12 x 30mm to M36 x 600mm: 164 sold in boxes and 59 as single assemblies.

The supplier names this product a structural assembly. The supplier data does not list what each assembly contains (for example the number of washers) or its thread length, so confirm these against your specification before ordering. K0 is the supplier's product designation and is not defined in the data used for this page.

Hobson lists class 8.8 as high tensile, and its class and grade chart pairs class 8.8 with imperial grade 5 (manufacturer-stated).

The Hobson guide gives a minimum tensile strength of 800 MPa for class 8.8 sizes below M16 and 830 MPa for M16 to M72, so M12 items are 800 MPa and M16 to M36 items are 830 MPa. This is the class minimum from a head-marking table and not a test result for the item (manufacturer-stated).

The Hobson acronym list defines 8.8S as snug tight, 8.8TB as a bearing joint with bolting fully tensioned and 8.8TF as a friction joint with bolting fully tensioned, all as per AS4100 (manufacturer-stated). The supplier data does not say which of these applies to these items, so check the joint design before ordering.

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

Longer lengths are sold as single assemblies and shorter lengths in boxes; the table shows which.

Where this product is used

• Bolted joints where a structural assembly is called for in the joint design
• Structural bolting where the nut, washers and bolt are fitted as one assembly
• Replacing an assembly of the same size, length and finish

Features

• 223 items: M12 x 30mm to M36 x 600mm
• Class 8.8 strength level
• Hot dip galvanised finish
• Minimum tensile strength for each size from the Hobson guide, shown in the table (manufacturer-stated)
• 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 size and length together: the assembly has to pass through all the plies in the joint plus the washers and nut. Check the joint design for the tightening category before ordering. Compare the pitch in the table with the nut you are using. Strength figures are the class 8.8 minimums in the Hobson guide, not a test result for the item (manufacturer-stated).

Related products

Related structural and cup head bolts: Hobson Metric Structural Assembly, Grade 8.8 High Tensile Steel, Galvanised, M12 to M36 and Hobson Cup Head Bolt & Nut, Class 8.8, Hot Dip Galvanised, M6 to M24.