Hexagon head bolt DIN 931 / ISO 4014, M 5x30, hexagon 8 mm, thread length 16 mm, steel 8.8, plain

Where a bolted joint has to fit exactly, any coating inside the thread gets in the way. This hexagon head bolt M 5x30 to DIN 931 is supplied plain and black and therefore keeps its nominal dimensions. The plain shank of 14 mm centres the part while the 16 mm of thread carry the preload. Tightening is done on the hexagon with 8 mm across flats.

Advantages

• Plain shank of 14 mm within 30 mm of total length, which places the shear plane in the full shank cross section instead of the thread.
• Hexagon head with 8 mm across flats, so the tightening torque can be applied with an ordinary open-ended or ring spanner.
• 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.
• Head height of 3.5 mm keeps the overall height of the joint low.
• Dimensions to DIN 931 and ISO 4014, so replacement and repeat orders are unambiguous through the designation M 5x30.

Applications

Flange joints in machine building where the 14 mm shank aligns the parts against each other. Bolting of bearing blocks and brackets with a through hole in size M 5. Building of fixtures and clamping plates where the head with 8 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 8 mm to DIN 931 and 8 mm to ISO 4014. The material is steel of property class 8.8, plain and black.