Hexagon head bolt DIN 931 / ISO 4014, M 10x55, hexagon 17 mm, thread length 26 mm, steel 8.8, plain

A fitted joint lives from the shank, not from the thread. This hexagon head bolt M 10x55 to DIN 931 provides a plain shank of 29 mm over its 55 mm of length and moves the thread to the last 26 mm. The shear plane therefore lies in the full shank cross section. The head is 6.4 mm high and is tightened across flats of 17 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 17 mm to DIN 931 and 16 mm to ISO 4014, both figures are stated and therefore known before assembly.
• Plain shank of 29 mm within 55 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Thread length of 26 mm to DIN 931, sufficient for a nut and a washer in size M 10.

Applications

Flange joints in machine building where the 29 mm shank aligns the parts against each other. Bolting of bearing blocks and brackets with a through hole in size M 10. Building of fixtures and clamping plates where the head with 17 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 17 mm to DIN 931 and 16 mm to ISO 4014. The material is steel of property class 8.8, plain and black.