Diameter: 12mm
Diameter 2: 21mm
Thickness: 10mm
Material: Steel
Finish: Red Rinsed Zinc
Driver Type: #19 Wrench
Thread Size: 1.75mm (Coarse)
Hardness: Class 8
Type: Hex Nut
Specifications: DIN 934
Box of 155.
Hex nuts are used to secure and fasten the threaded portion of most machine screws and bolts.