Hexagon head bolt DIN 931 / ISO 4014, M 20x90, hexagon 30 mm, shank 44 mm, steel 8.8, zinc-plated

Large flanges and steelwork transfer their loads through a small number of heavy bolts. This hexagon head bolt M 20x90 to DIN 931 brings a shank of 44 mm and a thread of 46 mm for that purpose. The head is 12.5 mm high and measures 30 mm across flats, so a torque wrench has a safe grip. The material is steel of property class 8.8 with an electroplated zinc coating.

Advantages

• Head height of 12.5 mm keeps the overall height of the joint low.
• Thread length of 46 mm to DIN 931, sufficient for a nut and a washer in size M 20.
• 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 44 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 30 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.

Applications

Steelwork and frame structures with through holes for M 20. Mounting of motors, gearboxes and pumps where the plain shank of 44 mm takes the shear load. Assembly of housing covers and panels with a clamping length up to 44 mm. Replacement of damaged standard bolts in size M 20x90.

Standards and conformity

The bolt is dimensioned to DIN 931 and ISO 4014. The width across flats is 30 mm to DIN 931 and 30 mm to ISO 4014. The material is steel of property class 8.8 with an electroplated zinc coating.