20mm-2.5 Black Phosphate Class 10 Steel Coarse Thread Hex Nuts

Diameter: 20mm
Diameter 2: 34mm
Thickness: 17mm
Material: Steel
Finish: Black Phosphate
Driver Type: #30 Wrench
Thread Size: 2.5mm (Coarse)
Hardness: Class 10
Type: Hex Nut
Specifications: DIN 934

Box of 41.

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