Parts

All parts used for the final design are listed below:

Press-Fit Stainless Steel Body Long-Nose Spring Plunger

Stainless Steel Nose, .125" Body Diameter, 1-2 lb Nose Force

https://www.mcmaster.com/8682A57/

Brass Screw-to-Expand Insert

for Plastic, 2-56 Thread Size, 0.156" Installed Length

https://www.mcmaster.com/92395A111/

18-8 Stainless Steel Button Head Hex Drive Screw

Black-Oxide, 2-56 Thread Size, 3/16" Long

https://www.mcmaster.com/97763A314/

Black-Oxide 18-8 Stainless Steel Washer

for Number 2 Screw Size, 0.094" ID, 0.25" OD

https://www.mcmaster.com/96765A105/

Neodymium Magnet

with Adhesive on North Pole, 0.06" Thick, 3/8" OD

https://www.mcmaster.com/7048T65/

Neodymium Magnet

with Adhesive on South Pole, 0.06" Thick, 3/8" OD

https://www.mcmaster.com/7048T59/

NITECORE Tube V2.0

Internal Lighting Components

https://flashlight.nitecore.com/product/tubev2.0

Loctite Instant Adhesive 

Fasten Hard-to-Bond Plastics 

https://www.mcmaster.com/74985A67/

Permatex Gasket Maker Sealant

Makes Irregular Shaped Gaskets

https://www.mcmaster.com/7535A12/

3M VHB 4929

Double-Sided Foam Mounting Tape, 3/4" Wide

https://www.mcmaster.com/75935A12/