How does the torque capacity of hexagon cap nuts compare to other types of nuts

The torque capacity of hexagon cap nuts can vary depending on various factors, including the specific design, material, and surface conditions. In general, the torque capacity of hexagon cap nuts is typically lower than that of standard hex nuts.
The domed shape of hexagon cap nuts reduces the contact surface area between the nut and the mating surface compared to regular hex nuts. This reduced surface area can result in lower friction and a lower torque capacity.
The amount of thread engagement between the hexagon cap nut and the mating bolt or stud can affect the load-bearing capability. Insufficient thread engagement may result in reduced strength and torque capacity.
The material used to manufacture the hexagon cap nut plays a significant role in determining its load-bearing capacity. Different materials, such as stainless steel, carbon steel, or brass, have varying strength properties that impact their torque capacity.
The condition of the threads on both the hexagon cap nut and the mating fastener can influence their load-bearing capability. Damaged or worn threads may reduce the effectiveness of the nut, resulting in lower torque capacity.
The presence or absence of lubrication between the nut and the mating surface can affect the torque required for tightening and, consequently, the load-bearing capacity. Proper lubrication can reduce friction and improve the torque transfer.

GB802.1 Combined hexagon cap nut

Material	Carbon steel /Alloy steel
Standard type	National standard GB
Standard	GB802.1
Diameter	M3-M48
Strength	4/6/8/10/12
Color	Self colour  Zinc plated  Black oxide  Yellow zinc plated  Hot galvanizing  White zinc plated  Hot galvanizing  Plating nickel             Dacromet  Geomet