How are straight kingpins secured to the steering knuckle?

Straight kingpins are secured to the steering knuckle using a combination of a tapered fit and a locking mechanism, typically a nut or a cotter pin. The tapered design ensures a tight fit, allowing for proper alignment and stability. Once the kingpin is inserted into the knuckle, the locking mechanism prevents any movement, ensuring safe and reliable steering performance. Regular maintenance checks are important to ensure these components remain secure over time.