Shoulder washers (T-nut slides) allow knob shafts to slide smoothly. The narrow end of the shoulder washer fits into a slot in a wood part, such as a castle side or loom side.
T-nut slides are included in the fold knob kit for Wolf looms.
How to Install
Insert the shaft of a knob through the wide end of the T-nut slide (shoulder washer). Attach the knob to the loom or accessory.