Hexagon head bolt DIN 931 / ISO 4014, M 8x40, hexagon 13 mm, shank 18 mm, steel 10.9, zinc-plated

In machine and fixture building the hexagon head bolt with shank is the standard fastener for drilled flanges. This version M 8x40 to DIN 931 carries 22 mm of thread and a plain shank of 18 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 10.9 with an electroplated zinc coating.

Advantages

• Hexagon head with 13 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.
• Plain shank of 18 mm within 40 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Thread length of 22 mm to DIN 931, sufficient for a nut and a washer in size M 8.
• Property class 10.9 in a zinc-plated version, which provides a more highly preloadable bolt with corrosion protection.
• Head height of 5.3 mm keeps the overall height of the joint low.

Applications

Conveying and plant equipment where joints in size M 8 are undone regularly. Bolting of profile frames and cross beams over a clamping range up to 40 mm. Mounting of guide rails and stops with a fitted hole for the shank. Joints where the width across flats of 13 mm has to match the available tools.

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 10.9 with an electroplated zinc coating.