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.
If replacing one suction cover, it is highly recommended that you replace all of them to be compliant. These suction covers are available for replacement of your older suction covers (spa models pre-2009). There is however no guarantee that these suction covers will fit your pre-2009 spa.
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.