Small Junction Box with Dual M16 / PG16 Cable Ports (8x4cm, Ruthex M3 Inserts)

A compact 8x4cm junction box designed specifically for low-voltage wiring connections, cable extensions, and transition splices between different cable types.

Featuring dual M16 threaded ports on opposing sides, it allows you to secure M16 / PG16 cable glands for proper strain relief and moisture resistance. Designed with weather resistance in mind, it is ideal for outdoor sensor wiring—such as extending a TL-136 hydrostatic water pressure sensor to a longer outdoor-rated cable run for home automation projects.

Key Features

• Compact Footprint: Outer dimensions of 8x4cm make it easy to tuck away while offering enough space for splices or wire connectors.

• Dual Inline M16 / PG16 Ports: Threaded openings on opposite sides for straight-through cable entry, strain relief, and cable gland sealing.

• Heat-Set Insert Lid Mounting: Uses Ruthex M3 threaded brass inserts in the base for durable, repeatable lid screwing without wearing out the plastic.

• Outdoor-Friendly: Designed to help protect low-voltage splices from outdoor elements when paired with suitable cable glands.

Hardware Needed

• Cable Glands: 2× M16 / PG16 threaded cable glands.

• Inserts: 4× Ruthex M3 heat-set threaded inserts.

• Lid Screws: 4x M3 screws (length depending on your lid clearance, typically m3×8mm to M3×10mm).

Recommended Print Settings

• Material: PETG or ABS/ASA (Highly recommended for UV and weather resistance outdoors).

• Layer Height: 0.20 mm

• Infill: 15–20% (Gyroid or Grid)

• Wall Loops / Perimeters: 3–4 walls (ensures plenty of material for pressing in heat-set inserts and securing M16 threads)

• Supports: No supports required but can assist in better threads