Grex A150022 - Nut Grex from $2.01 $2.45 Qty. Add to Cart SKU: GRX-A150022 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Genuine Grex replacement part A150022 - Nut. For Grex Models XT, TG, TS. Chart referance number 31. Tweet