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Black thermoplastic lockout padlock with stainless steel shackle

Master Lock

Master Lock S31BLK Lockout Padlock Keyed Different Black

SKU CH-8X1E-X5D7T

A corrosion-resistant thermoplastic lockout padlock with a stainless-steel shackle and non-removable key for safety isolation

  • TypeKey Retaining
  • Key-retaining design prevents accidental unlocking
  • Corrosion-resistant thermoplastic body suits harsh environments
  • Stainless steel shackle resists cutting and sawing
  • Keyed-different system gives each lock a unique key
  • Includes write-on danger labels for clear identification

Lockout Padlock for Safety Procedures

The Master Lock S31BLK is a thermoplastic lockout padlock designed for industrial safety programmes. Its key-retaining mechanism keeps the key captive until the shackle is locked, preventing accidental removal during maintenance. The black body provides clear visual identification on tagged equipment.

Check Keying and Shackle Fit Before Ordering

Each padlock is keyed different so multiple workers can carry unique keys without duplication. Verify that the 3/16 inch shackle diameter and 5/8 inch horizontal clearance match the hasp or lockout point on your machinery. Confirm the 1 1/2 inch vertical shackle height clears the device you intend to secure.

Thermoplastic Body With Stainless Steel Shackle

The corrosion-resistant thermoplastic body withstands chemicals and outdoor exposure while remaining non-conductive. A stainless steel open shackle resists cutting and rust in harsh environments. Included danger labels attach to the lock body for immediate hazard communication during lockout operations.

Highlights

  • Key-retaining design prevents accidental unlocking
  • Corrosion-resistant thermoplastic body suits harsh environments
  • Stainless steel shackle resists cutting and sawing
  • Keyed-different system gives each lock a unique key
  • Includes write-on danger labels for clear identification

Specifications

BrandMaster Lock
TypeKey Retaining

Questions about this item

Does the Master Lock S31BLK package include the key and the warning labels, or must I order them separately?

Each lock comes with its own key and the supplied Danger labels, so nothing else is required to start using it.

When should I choose the Keyed Different option instead of a keyed-alike set?

Choose Keyed Different when every lock must open only with its own unique key, which is the standard for personal lockout assignments.

What does the 3/16 in shackle diameter mean for fitting through standard lockout hasps?

The 3/16 in stainless steel shackle fits most common lockout hasps and valve covers while providing corrosion resistance.

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