Hexagon head bolt DIN 931 / ISO 4014, M 20x80, hexagon 30 mm, shank 34 mm, stainless steel A2

Outdoors and in wet areas large bolts must still come loose after years. This hexagon head bolt M 20x80 to DIN 931 made of stainless steel A2 stays resistant without a coating. The plain shank measures 34 mm and the thread 46 mm. The hexagon head has 30 mm across flats and a height of 12.5 mm.

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.
• Stainless steel A2 stays bright under moisture and wash water, so an additional coating is not needed.
• Plain shank of 34 mm within 80 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

Flange joints in machine building where the 34 mm shank aligns the parts against each other. Bolting of bearing blocks and brackets with a through hole in size M 20. Building of fixtures and clamping plates where the head with 30 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 30 mm to DIN 931 and 30 mm to ISO 4014. The material is stainless steel A2.