M5x.8, 5mm Metric Hex Nut with Free Spinning Conical Spring Washer

Spin Nuts turn freely during install until the conical washer is compressed against the mating surface as the nut is tightened. The locking tension created by the compressed washer helps prevent the nut from loosening during vibration.

These free spinning washer nuts are reusable and offer a one-piece solution versus using a separate lock washer and a nut.

Diameter / Screw Size: 4mm
Pitch: 0.8 Coarse Thread

Wrench Size: 8mm
Washer Outer Diameter: 12mm

Height of Nut: 4.0mm
Overall Height without Compression: 5.3mm

Nut Material: Class 8 Steel
Nut Finish: Yellow Zinc Plated

Washer Material: 420HV Steel
Washer Finish: Yellow Zinc Plated

Also known as metric hex nut with non-removable captivated / captive washer.