Hexagon head bolt DIN 931 / ISO 4014, M 8x90, hexagon 13 mm, shank 68 mm, steel 8.8, zinc-plated

In machine and fixture building the hexagon head bolt with shank is the standard fastener for drilled flanges. This version M 8x90 to DIN 931 carries 22 mm of thread and a plain shank of 68 mm that aligns the parts against each other. The hexagon head measures 13 mm across flats and 5.3 mm in height. The material is steel of property class 8.8 with an electroplated zinc coating.

Advantages

• Head height of 5.3 mm keeps the overall height of the joint low.
• Thread length of 22 mm to DIN 931, sufficient for a nut and a washer in size M 8.
• Steel of property class 8.8 with an electroplated zinc coating, so the joint stays releasable in dry and occasionally damp surroundings.
• Plain shank of 68 mm within 90 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Hexagon head with 13 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.

Applications

Flange joints in machine building where the 68 mm shank aligns the parts against each other. Bolting of bearing blocks and brackets with a through hole in size M 8. Building of fixtures and clamping plates where the head with 13 mm across flats must stay freely accessible. Releasable joints that are opened several times for maintenance.

Standards and conformity

The bolt is dimensioned to DIN 931 and ISO 4014. The width across flats is 13 mm to DIN 931 and 13 mm to ISO 4014. The material is steel of property class 8.8 with an electroplated zinc coating.