M8x1.25-12mm Metric Hex-Head & Cylinder
Nut Smooth Flange

Zinc Plated—Meet DIN 6923
Bag of 10
Metric High-Strength Class 10 Steel
These are the nuts you need for heads and cylinders that won't gall the metal as the serrated will.

Also available with a 13mm Hex - Zinc

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Material Steel
Class 10
Finish  

Black Phosphate

Thread Direction Right Hand
Specifications Met DIN 6923
Thread Size M8 × 1.25
Width 12 mm
Flange
Diameter 17.5 mm
Height 1.1 mm
Overall Height 8 mm