Open Nut, 60° Taper, 19 Hex, 25 Height 

An open-ended wheel nut with a 60° conical (tapered) seat, 19mm hex and 25mm overall height. 

The open-end format leaves the wheel stud tip exposed, making it suitable for applications where stud length varies or where a closed nut risks bottoming out before full clamping force is achieved.

At 25mm, this nut provides additional thread engagement depth compared to compact 17mm variants, suited to wheel or mounting configurations requiring greater contact length. 

The 19mm hex is compatible with standard socket sets and OEM wheel brace tools across European, Japanese, and Korean vehicles. Black variants carry the RYBO name inscribed on the hex face. Source

Quick Specifications

• Seat Type: 60° conical / taper
• Hex Size: 19mm across flats
• Overall Height: 25mm
• Colour Options: Black (RYBO hex inscription) / Silver
• Thread Options: M12 × 1.25 | M12 × 1.5 | M12 × 1.75 | M14 × 1.25 | M14 × 1.5 | M14 × 2 | 7/16 UNF | 1/2 UNF
• SKU: N175B
• Sold As: Individually

60° Conical Seat Type

A 60° conical seat distributes clamping force through a tapered surface that matches the wheel's bolt hole. During tightening, the angled contact self-centres the wheel and creates a secure mechanical lock. This seat geometry is standard across most aftermarket alloy wheels and many OEM fitments, but must be matched precisely, using a conical nut on a ball-seat or flat-seat wheel creates point contact instead of full surface engagement, compromising safety.

Common Applications

Commonly specified for alloy wheels requiring a 60° taper seat across a range of fitments:

• Aftermarket alloy wheels with standard conical bolt holes
• OEM wheels on selected European, Japanese, and Korean vehicles using the listed thread pitches
• Replacement or upgrade fitments where a 25mm nut height improves thread engagement over shorter variants

*Select your correct thread variant above