Hexagon head bolt DIN 931 / ISO 4014, M 8x70, hexagon 13 mm, shank 48 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 8x70 to DIN 931 carries 22 mm of thread and a plain shank of 48 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

• Thread length of 22 mm to DIN 931, sufficient for a nut and a washer in size M 8.
• Plain shank of 48 mm within 70 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Head height of 5.3 mm keeps the overall height of the joint low.
• Hexagon head with 13 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.
• Steel of property class 8.8 with an electroplated zinc coating, so the joint stays releasable in dry and occasionally damp surroundings.

Applications

Fixture building with repeated changeovers in size M 8x70. Bolting of tank and pipe supports in wet areas. Mounting of sheet metal structures where the head height of 5.3 mm is limited. Retrofitting of existing plants using the designation DIN 931.

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.