M16 M18 IP68 Waterproof Wire Connectors 2 3 4 5 8 Pin Male Female Cable Connector

The M18 Waterproof Plug (also referenced in the North American market as the 7/8-inch circular connector) is a mid-large threaded interconnect built on an M18×1.0 coupling nut (≈18 mm nut OD). It sits between M12 (sensor-grade, ≤4 A) and M20/M25 (heavy power) in the industrial connector ladder, delivering IP67 as standard and IP68 optional when mated. Capable of carrying up to 16 A per contact at 250-300 V AC/DC on 2-4 pin power builds, it's available as field-wireable screw/solder plug, molded-with-cable cordset, panel flange socket, or 90° right-angle configuration. This connector serves as the default sealed interface for larger sensors, valve islands, 24 VDC/230 VAC auxiliary power, outdoor LED trunks, and 7/8-inch industrial Ethernet/fieldbus taps where M12 lacks current headroom and M20 is over-sized.

• 16 A / 250-300 V capacity in an 18-mm shell: Covers 24 VDC valve clusters, 230 VAC cabinet auxiliary feeds, and 48 VDC LED landscape trunks without requiring M20 connectors
• IP67 locked, IP68/IP69K optional: Silicone O-ring face + M18×1 threaded nut + rear gland (cable OD 5-10 mm, PG9/PG13.5 class) survives 1 m/30 min immersion, hose-down, oil mist, and dust storms
• Field-wireable OR molded options: Screw-clamp accepts 0.5-1.5 mm² (20-16 AWG), solder cup to 1.5 mm², IDC optional—enables on-site cable customization and quick repairs
• 2-17 pins, A-coded + hybrid configurations: A-code power/sensor (2/3/4/5/7/8/12/17-pin), 2+4 power+signal hybrid, keyed polarization prevents L/N/G reverse on DC LED and AC auxiliary runs
• Industrial-grade contacts & shell: Copper alloy/brass, gold or Optalloy flash, ≤10 mΩ contact resistance; PA66+GF or PBT shell (UL94-V0), Ni-plated brass nut anti-vibration
• Multiple configurations: Straight / 90° / panel / flange options fit enclosure faceplate and harness mid-span requirements
• Lower BOM than junction box + gland: Replaces panel gland + internal terminal block + strain relief; coded keying prevents miswiring, reusable for RMA without cutting external harness

• Coupling: M18 × 1.0 threaded nut (≈18 mm OD), knurled PA or Ni-brass
• Forms: inline plug-socket, 90° plug, front/rear panel flange, THT PCB socket
• Pins: 2 / 3 / 4 / 5 / 7 / 8 / 12 / 17
• Coding: A-code (power/sensor), non-coded; keyed
• Termination: screw-clamp (field), solder cup, IDC, or molded-with-cable (PVC/PUR/TPE)
• Gland: rear strain relief, cable OD 5-10 mm (PG9/PG13.5 class)
• Shell: PA66+GF / PBT (black/grey) or Ni-plated brass/zinc; shielded optional
• Seal: silicone O-ring + rear grommet; optional mating cap
• Wire: 0.5-1.5 mm² (20-16 AWG) screw; ≤1.5 mm² solder

• vs M12 plug: +300% current (16 A vs 4 A), larger cable OD, same threaded lock logic when space allows
• vs M20 inline coupler: 20% smaller footprint, lower BOM, sufficient for every 24 VDC valve cluster and 230 VAC auxiliary feed
• vs junction box + PG gland + terminal block: M18 plug serves as the sealed coded landing—reusable, keyed, 70% faster field join
• vs 7/8-inch only-labeled generic: M18×1.0 = same 7/8-inch class, intermates with binder 714, Turck, Pepperl+Fuchs V18, Amphenol C091 families

• Factory automation: larger inductive sensors, valve islands, 24 VDC actuator trunks, IO-Link power+signal combos
• Industrial power entry: 230 VAC cabinet auxiliary feed, 48 VDC battery bus tap, small motor/gearbox power plug
• Outdoor LED & street lighting: landscape/path light trunks, facade LED splits, streetlight controller auxiliary
• Solar & storage: PV combiner auxiliary, solar streetlight battery-to-lamp, off-grid 48 VDC distribution
• Robotics & AGV: AGV onboard charger plug, mobile robot 48 V power drop, cobot wrist tool heavier feed
• Process & packaging: conveyor motor taps, packaging machine AC auxiliary, washdown-rated sensor plugs
• Telecom & transport: wayside cabinet auxiliary, NMEA 2000 micro drops, marine deck lighting feeds