
Screws included #8-32. They fall into the threaded holes in the cast body. The included grounding screw begins to engage the threads approximately 1/16 inch before seating on the flange head. Running a ground wire underneath is not enough. The holes in the molded case appear to be M4.5. The M4 or #8 screw is too small. Screw #10-32 or M5 is too big. standard screw. This is hanging by the window upstairs, working on the boxes installed on the outside of the house. Basically, the quality control is not running, sort out parts.

Protect Your Electronics With Zulkit'S Blue Metal Enclosure: DIY Project Case With Preventive Features (9.1" X 7.3" X 3.9")
13 Review

Zulkit Junction Box ABS Plastic Waterproof IP65 Electrical Boxes Hinged Shell Outdoor Universal Project Enclosure With Mounting Plate And Wall Brackets Grey 11.8X7.9X6.3 Inch(300X200X160Mm)
10 Review

⚡️ RVGUARD 50 Amp Weatherproof Outdoor Electrical Power Outlet Box - Lockable RV/EV NEMA 14-50R Receptacle Panel, 125/250V, ETL Listed
9 Review

Zulkit 5Pcs Black ABS Plastic Project Boxes - Ideal For Electrical And Power Junctions (80 X 50 X 21 Mm)
10 Review

💡 Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review

Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review

Wireless Electronic Ballast Interface Certified
8 Review

🔌 Robertson 2P20132 Quik-Pak: 10 Fluorescent eBallasts for 2 F40T12 Linear Lamps, Preheat Rapid Start, 120Vac, 50-60Hz, Normal Ballast Factor, NPF, Model RSW234T12120 /A (Crosses to RSW240T12120 /B)
4 Review