4mm-0.7 Chrome Plated Steel Coarse Thread Flange Nuts (12 pcs.)

Diameter: 4mm
Diameter 2: 7.8mm
Thickness: 5mm
Material: Steel
Finish: Chrome
Driver Type: #7 Wrench
Thread Size: 0.7mm (Coarse)
Style: Non-Serrated
Type: Flange Nut
Specifications: DIN 6923
Diameter 3: 9.8mm

Box of 12.

A flange nut has a wide flange at one end that acts as an integrated, non-spinning washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface.