Diameter: 5mm
Diameter 2: 8.9mm
Thickness: 3.9mm
Material: Steel
Finish: Zinc
Driver Type: #8 Wrench
Thread Size: 0.8mm (Coarse)
Hardness: Class 8
Style: Left Hand Thread
Type: Hex Nut
Specifications: DIN 934

Box of 20.

Hex nuts are used to secure and fasten the threaded portion of most machine screws and bolts.