40Pcs M5x16mm Yellow Zinc Plated 4.8 Grade phillips Drive Serrated Flange Hex Head Bolt Double Rod Cylinders Inner Diameter x Outer Diameter:

Inner Diameter x Outer Diameter: 14

Super elastic torque can absorb vibration

The amount of visibility is determined by the degree of the lens

Also Dustproof

accuracy of Class 2

40Pcs M5x16mm Yellow Zinc Plated 4.8 Grade phillips Drive Serrated Flange Hex Head Bolt Double Rod Cylinders Inner Diameter x Outer Diameter:Iron construction with yellow zinc plated for good corrosion resistance. Flange bolts are widely applied in many assembled occasions. Generally use for fastening two parts with nuts. Flange hex head has the same characteristic as external hex with washer. Flange provides a bearing surface for load distribution. Features hex head with serrated flange, metric thread, external hex or phillips drive for more flexible working in different situation.