Check the listing for details. BICYCLE BOTTOM BRACKET HEXAGON LOCKNUT BMX FIXIE BEACH CRUISER, LOWER CRANK NUT.. Color: UCP, Condition: New. Listed at 7.89 USD. Specifications: Use: Lock NutThe hexagon lock nut is used to secure the bottom bracket in place, preventing it from loosening during use. It plays a crucial role in maintaining the integrity and alignment of the bottom bracket assembly. Size: 24 tpi (Threads Per Inch)The threading of this lock nut is 24 tpi, which is a standard threading specification for many bicycle bottom brackets, particularly in American-style bottom brackets. This threading ensures a secure fit when paired with compatible bottom bracket components. Material: SteelConstructed from high-quality steel, this lock nut provides excellent strength and durability. Steel is known for its resistance to wear and deformation, making it suitable for the demands of cycling. Color: UCP (Ultra Chrome Plated)The UCP finish gives the lock nut a shiny, polished appearance while also providing protection against corrosion and rust. This finish not only enhances the aesthetic appeal but also contributes to the longevity of the component. Brand: AltaLineAltaLine is recognized for producing reliable bicycle components. Their products, including this lock nut, are known for their durability and performance, making them a trusted choice for cyclists.Functionality: Purpose:The Bottom Bracket Hexagon Lock Nut is essential for ensuring that the bottom bracket remains securely fastened within the frame. It helps prevent movement and loosening that can lead to poor performance or damage to the bicycle. Installation:This lock nut is typically installed using a hex key or wrench, which allows for easy tightening and adjustment. Proper installation is crucial to ensure that the bottom bracket functions effectively and maintains the correct alignment.