Hex nuts are for general applications and are used with bolts and washers of the same finish. The most commonly used nut, they are often found in deck
The Hillman Group 43815 M12-1.25 Metric Hex Jam Nut, 10-Pack : Industrial & Scientific
The Hillman Group 44085 M12-1.75 x 35 Metric Flange
Steel Hex Nut, Plain Finish, Class 10, DIN 934, Metric, M12-1.75 Thread Size, 19 mm Width Across Flats, 10 mm Thick (Pack of 25) : : Tools & Home Improvement
Dorman 431-312 Hex Nut-Class 10- Thread Size M12-1.25
M6-0.75mm (50 pcs) Hex Nuts, 304 (18-8) Stainless Steel, Hexagon
Dorman 783-013: Hex Nut - Class 10.9 - Thread Size M12-1.75 : : Tools & Home Improvement
The Hillman Group 2468 M12-1.75 - Metric Pitch Hex Nut, 20-Pack,Zinc : Industrial & Scientific
The Hillman Group 2468 M12-1.75 - Metric Pitch Hex Nut, 20-Pack,Zinc, Hex & Machine Screw Nuts - Canada
Cap Screw-Hex Head-Class 8.8- M12-1.25 x 25mm