Hexagon head bolt DIN 931 / ISO 4014, M 6x90, hexagon 10 mm, shank 72 mm, steel 8.8, zinc-plated

When thin sheets and small add-on parts are bolted together, every millimetre of head height counts. This hexagon head bolt M 6x90 to DIN 931 has a head only 4.0 mm high and is tightened across flats of 10 mm. Of the total length of 90 mm, 18 mm carry the thread while the remaining 72 mm form a plain shank. The shank bears against the drilled hole and takes shear loads instead of passing them through the thread flanks. The material is steel of property class 8.8 with an electroplated zinc coating.

Advantages

• Head height of 4.0 mm keeps the overall height of the joint low.
• Thread length of 18 mm to DIN 931, sufficient for a nut and a washer in size M 6.
• 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 72 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 10 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.

Applications

Fixture building with repeated changeovers in size M 6x90. Bolting of tank and pipe supports in wet areas. Mounting of sheet metal structures where the head height of 4.0 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 10 mm to DIN 931 and 10 mm to ISO 4014. The material is steel of property class 8.8 with an electroplated zinc coating.