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Master Lock

Master Lock 410S6BLK Lockout Padlock, Keyed Different, Thermoplastic, Black

SKU CH-3AAH-HF4MC

Keyed-different thermoplastic lockout padlock with non-conductive body and metal shackle for safety isolation

  • TypeTraffic & Parking Lot
  • Keyed different for unique access control per lock
  • Thermoplastic body resists chemicals and corrosion
  • Non-conductive construction prevents electrical hazards
  • Non-removable key stops accidental key loss
  • 13/16 in shackle clearance fits standard hasps

Master Lock 410S6BLK Lockout Padlock

This Master Lock 410S6BLK padlock uses a black thermoplastic body that resists chemicals and is non-conductive. It has a metal open shackle measuring 1/4 in diameter with 1 1/2 in vertical clearance. The keyed-different cylinder means each lock requires its own key and the key cannot be removed while the shackle is open. The lock body is 1 3/4 in high and 1 1/2 in wide with a danger header printed on the front.

Who this suits and who should look elsewhere

The lock is built for lockout-tagout procedures where non-conductive, chemical-resistant hardware is required. It suits maintenance teams needing one unique key per padlock for individual accountability. Buyers who need multiple locks opened by a single key should choose a keyed-alike set instead. Those requiring a removable key or a shackle that closes automatically will need a different design.

Behaviour under sustained use

The thermoplastic body maintains its chemical resistance and non-conductive properties during repeated exposure to industrial solvents and electrical environments. The metal shackle withstands repeated locking cycles without deformation. The non-removable key feature prevents accidental key loss during extended lockout periods. The danger header remains legible after prolonged outdoor or indoor use.

Highlights

  • Keyed different for unique access control per lock
  • Thermoplastic body resists chemicals and corrosion
  • Non-conductive construction prevents electrical hazards
  • Non-removable key stops accidental key loss
  • 13/16 in shackle clearance fits standard hasps

Specifications

BrandMASTER LOCK
TypeTraffic & Parking Lot

Questions about this item

Does this lockout padlock need a specific hasp or chain link size to fit its 1/4 in shackle?

The 1/4 in shackle diameter and 13/16 in horizontal clearance will fit standard lockout hasps and chain links that accept a 1/4 in shackle.

Can I use the same key for this padlock and other Master Lock padlocks I already own?

No, this unit is keyed different so each lock has its own unique key; it will not share a key with other Master Lock padlocks.

How can I confirm the padlock is properly engaged after I snap the shackle shut?

The non-removable key feature means the key cannot be withdrawn until the shackle is fully locked, giving a clear mechanical indication it is secured.

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