This is parts is (10) Zinc cabinet panel screw Collets that can be used for many hot tub side panels.
This Collet fits a screw that is a #8.
Many Hot Tub Panels Each panels use 8-10 screws per panel - 3 on each side, two on the bottom and two on the top.
The Single Screw can be found here:
The Single Collet for this screw can be found here:
The Set if 10 Screws can be found here:
The Set of 10 Collets set for the Screw Set can be found here:
The Set of 40 Screws can be found here:
The Set of 40 Collets set for the Screw Set can be found here: