Hexagon head bolt DIN 931 / ISO 4014, M 12x50, hexagon 19 mm, thread length 30 mm, steel 8.8, plain

A fitted joint lives from the shank, not from the thread. This hexagon head bolt M 12x50 to DIN 931 provides a plain shank of 20 mm over its 50 mm of length and moves the thread to the last 30 mm. The shear plane therefore lies in the full shank cross section. The head is 7.5 mm high and is tightened across flats of 19 mm. The bolt is made of steel of property class 8.8, 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 19 mm to DIN 931 and 18 mm to ISO 4014, both figures are stated and therefore known before assembly.
• Plain shank of 20 mm within 50 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Thread length of 30 mm to DIN 931, sufficient for a nut and a washer in size M 12.

Applications

Steelwork and frame structures with through holes for M 12. Mounting of motors, gearboxes and pumps where the plain shank of 20 mm takes the shear load. Assembly of housing covers and panels with a clamping length up to 20 mm. Replacement of damaged standard bolts in size M 12x50.

Standards and conformity

The bolt is dimensioned to DIN 931 and ISO 4014. The width across flats is 19 mm to DIN 931 and 18 mm to ISO 4014. The material is steel of property class 8.8, plain and black.