Hexagon head bolt DIN 931 / ISO 4014, M 20x80, hexagon 30 mm, thread length 46 mm, steel 8.8, plain

More highly preloaded joints need a defined shank cross section. This hexagon head bolt M 20x80 to DIN 931 in steel of property class 8.8, plain and black offers 34 mm of plain shank and limits the thread to 46 mm. Tightening takes place on the hexagon with 30 mm across flats at a head height of 12.5 mm. The surface is plain and black.

Advantages

• Steel of property class 8.8, left plain and black, which means no coating thickness on the thread and an exact fit in the hole.
• Width across flats of 30 mm to DIN 931 and 30 mm to ISO 4014, both figures are stated and therefore known before assembly.
• 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.
• Thread length of 46 mm to DIN 931, sufficient for a nut and a washer in size M 20.

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 steel of property class 8.8, plain and black.