M16 M20 Wire Waterproof Outdoor Lighting Connectors Male Female Straight Screw Lock IP67

The M20 Inline Weather-Resistant Connector (also known as an M20 straight coupler or I-type axial sealed junction) is a cylindrical power and signal link consisting of a straight barrel body with an M20×1.5 (PG13.5-class) threaded locking collar on each end. It connects two cable segments in a straight line—one cable enters, one cable exits—while keeping the splice point fully enclosed at IP67/IP68.

Unlike a T-shaped or Y-shaped divider, it does not create a branch; unlike a junction box, it has no interior cavity that could accumulate water or condensation. Think of it as a reusable, field-terminable "extension connector" for outdoor and industrial cable runs that were cut too short, require mid-line repair, or need to pass through a panel opening with a clean sealed entry.

The "inline" design is the key customer feature: low height, no side projection, slips smoothly through conduit, cable trays, or panel holes, and supports up to 20 A (2/3-pin) or 24 A within a 20 mm shell.

• On-demand cable lengthening, fully sealed: Repair a damaged LED main line or sensor return path on site—strip both ends, insert into the two halves, twist to lock, completed in under 10 minutes. No enclosure, no tape, no heat-shrink failure.
• IP67 standard / IP68 upgrade (when mated): Dual O-rings plus rear cable gland seals block rain, pressure washing, dust, and short-term submersion (IP68 means 1 m+ continuous). Outperforms open terminal blocks plus junction boxes in every outdoor setting.
• 20 A capacity in a slim 20 mm barrel: 2/3-pin 300 V / 20 A, 4-pin 10-12 A, 5-pin 5 A signal—covers streetlight feeds, 24/48 VDC battery rails, AC auxiliary power, and multi-conductor sensor extensions without moving up to M25/M32.
• Field-friendly screw terminals: Accepts 0.5-2.5 mm² (24-14 AWG) and cable outer diameter 5-12 mm (by changing gland inserts), freeing you from factory cordset lengths or minimum order quantities.
• Keyed polarity prevention: 2/3/4/5-pin keyed inserts stop Live/Neutral/Earth or positive/negative errors; colored shells (black/grey/blue) allow circuit identification.
• Industrial-strength contacts and housing: Copper alloy pins, gold or silver plating, ≤ 5 mΩ contact resistance; PA66+GF UL94-V0 shell, -40 °C to +105 °C, UV-stable.
• Reopenable and reusable: Unscrew, re-terminate, re-lock—ideal for rental equipment, stage gear, and prototype machinery.
• Vibration-resistant threaded lock: M20×1.5 locking nut with knurled grip withstands vibration on conveyors, automated guided vehicles, and solar tracking systems.

• Form: straight inline (I-type) male-female pair or genderless field coupler
• Fastening: M20×1.5 metric thread nut (compatible with PG13.5/M20 panel mounts)
• Contacts: 2 / 3 / 4 / 5 (power and signal); hybrid 2+3/2+4 available on request
• Termination: screw-clamp (standard field type), solder cup, or pre-molded cable
• Gland: integrated strain relief, adjustable O-ring set for 5-12 mm outer diameter
• Sealing: silicone/EPDM O-rings plus rear bushing; optional protective cap when unmated
• Body: PA66+GF (black/grey), nickel-plated brass or 316 stainless steel for marine environments
• Ratings: IP67 standard, IP68 optional; 300 V (2/3P), 250 V (4P), 110 V (5P); 20 A / 15 A / 12 A / 5 A respectively

• Versus a junction box plus glands: 60% smaller volume, no internal water trap, light-tool field connection, reusable, no cover screws that can seize
• Versus heat-shrink tubing plus taped splice: maintains IP rating for years, inspectable, reopenable
• Versus M12 inline coupler: 5× the current capacity (20 A vs 4 A), wider cable diameter acceptance, same locking principle
• Versus pre-made extension cables: cut to any length on site, repair rather than scrap, one SKU fits all runs

• Outdoor LED and roadway lighting: mid-run repairs of trunk lines, fixture-to-fixture jumpers, tunnel and building facade extensions
• Solar and battery systems: photovoltaic string lengthening, inverter DC bus connection, off-grid 48 V battery interconnects
• Factory automation: sensor and encoder cable extensions on conveyor lines, robot dress packs, PLC cabinet external feeds
• Surveillance and smart city infrastructure: camera power and data inline joints, pole-to-pole DC taps
• Marine, caravan, and agricultural settings: deck light circuits, tractor implement harness extensions, irrigation solenoid valve feeds
• Entertainment and event power: temporary outdoor audio/lighting power distribution, IP-rated feeder joins