Designed specifically for preventing fasteners from coming loose after they are tightened, the ⅜’’ SS Split Lock Washer from Master Spa Parts is the perfect choice for fastening essential components of your spa.
Thumbscrew 1/4 - 20 x 1.75 inch. These are used to secure your corner skirting pieces on your spa in place. This part is the longer of the two thumb-screws available.