The Chris King GripNut 1" threaded headset features a system where the locknut and adjustable cup are joined by an internal threaded sleeve that allows a precise adjustment that will not allow the cups to un-thread and loosen. Due to this design it is not possible to put spacers in between the locking and adjusting cups, so stack height is non-adjustable. If you do not require a taller stack height, this is the perfect choice for a threaded headset, if you do require stack, then try the 2Nut design. Since most folks using 1" threaded headsets these days do not stack, this is our most popular choice.
As expected with Chris King products, the machining, tolerances and attention to detail is simply perfect. These carry a 10 year warranty and available in classic silver or black-on-black Sotto Voce, both have a high polish finish.
The GripNut design attaches the locking and adjusting nuts via a sleeve. While this greatly improves the headset by keeping it in constant adjustment, it will not accept spacers between the locking and adjusting nuts to increase stack height.