Hexagon head bolt DIN 931 / ISO 4014, M 8x70, hexagon 13 mm, thread length 22 mm, steel 10.9, plain

A fitted joint lives from the shank, not from the thread. This hexagon head bolt M 8x70 to DIN 931 provides a plain shank of 48 mm over its 70 mm of length and moves the thread to the last 22 mm. The shear plane therefore lies in the full shank cross section. The head is 5.3 mm high and is tightened across flats of 13 mm. The bolt is made of steel of property class 10.9, plain and black.

Advantages

• Property class 10.9, plain and black, suited to more highly preloaded joints in protected indoor positions.
• Width across flats of 13 mm to DIN 931 and 13 mm to ISO 4014, both figures are stated and therefore known before assembly.
• 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.
• Thread length of 22 mm to DIN 931, sufficient for a nut and a washer in size M 8.

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 10.9, plain and black.