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Black plastic padlock with plastic shackle and keyhole

Master Lock

Master Lock Zenex Black Non-conductive Door Lock

SKU CH-RSF5-4G4KQ

Non-conductive thermoplastic padlock with plastic shackle for lockout safety

  • TypeNon-conductive
  • Non-conductive body protects against electrical hazards
  • Thermoplastic construction resists corrosion and chemicals
  • 13/16 in horizontal shackle clearance fits tight hasps
  • 1 1/2 in vertical shackle clearance accommodates thick chains
  • Keyed-different cylinders prevent unauthorised key duplication

Non-conductive lockout padlock

This padlock uses a thermoplastic body and plastic shackle to eliminate electrical conductivity. It is built for lockout-tagout procedures where metal components would create a shock hazard. The keyed-different cylinder ensures each lock in a set requires its own unique key. Workers needing personal isolation points on energised equipment will find it suited to that role.

Thermoplastic body with plastic shackle

The 13/16 inch horizontal and 1 1/2 inch vertical clearances allow the shackle to fit standard lockout hasps and breaker toggles. A non-removable key design prevents the key from being withdrawn while the shackle remains open. This reduces the chance of a lock being left unsecured on an isolation point. The lightweight plastic construction also avoids damage to painted or coated surfaces during daily use.

Limits of plastic shackle strength

The plastic shackle resists corrosion and chemicals but lacks the shear strength of hardened steel. It is not intended for high-security perimeter gates or heavy-duty chain applications. Buyers who need cut resistance for outdoor asset protection should select a metal-shackle alternative. The keyed-different format also means this single unit cannot be integrated into an existing keyed-alike master system.

Highlights

  • Non-conductive body protects against electrical hazards
  • Thermoplastic construction resists corrosion and chemicals
  • 13/16 in horizontal shackle clearance fits tight hasps
  • 1 1/2 in vertical shackle clearance accommodates thick chains
  • Keyed-different cylinders prevent unauthorised key duplication

Specifications

BrandMaster Lock
TypeNon-conductive

Questions about this item

What non-conductive standard does the Zenex lock meet, and what does that cap in practice?

The thermoplastic body and plastic shackle are non-conductive, preventing electrical current from passing through the lock during lockout procedures.

What clearance does the 13/16 in shackle need to fit through a hasp or latch?

The horizontal and vertical shackle clearances are both 13/16 in, so the mounting point must accommodate at least that width and height.

How is the key-retaining cylinder installed, and what step do users often miss?

The keyed-different cylinder is factory-fitted; the non-removable key feature means the key cannot be withdrawn unless the shackle is locked, so users must turn the key back to the locked position before removing it.

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