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Master Lock 6321 rekeyable padlock, 2.125in wide, black iron shroud over boron-alloy shackle

Master Lock

Master Lock 6321 Rekeyable Padlock 2.125in inventory supply

SKU CH-33C1-7HT4Z MPN 6321

Rekeyable padlock with a boron-alloy shackle and solid-iron shroud resists bolt cutters and prying

  • Rekeyable cylinder lets you change keys without replacing the whole lock
  • Boron-alloy shackle resists bolt-cutters for strong cut protection
  • Solid-iron shroud shields the shackle from saw and pry attacks
  • Dual-deadbolt locking mechanism withstands prying force on doors or gates
  • 125in wide body fits standard hasps on sheds, fences and doors

High-security padlock for sheds and fencing

The Master Lock 6321 is a rekeyable padlock built to secure sheds, fencing or doors against theft. Its boron-alloy shackle sits inside a solid-iron shroud that resists bolt cutters. A dual-deadbolt locking mechanism adds pry resistance. The cylinder or shackle can be replaced when keys are lost or access needs change.

Replaces fixed-cylinder padlocks when key control

This model upgrades from standard padlocks that must be discarded after a key compromise. The rekeyable design makes the jump worthwhile for sites where multiple locks share a key system or where cylinders are rotated on a schedule. It is not for buyers who need a non-rekeyable, single-use lock or who require an electronic access audit trail.

Mechanical lock limits access management

The padlock relies entirely on a physical cylinder and key; there is no electronic credential, remote revocation or access log. Lost keys require a cylinder swap rather than a software reset. The 2.125in wide body fits standard hasps but may not suit narrow latch points. Environments needing time-based access or centralised credential control will need a different platform.

Highlights

  • Rekeyable cylinder lets you change keys without replacing the whole lock
  • Boron-alloy shackle resists bolt-cutters for strong cut protection
  • Solid-iron shroud shields the shackle from saw and pry attacks
  • Dual-deadbolt locking mechanism withstands prying force on doors or gates
  • 125in wide body fits standard hasps on sheds, fences and doors

Specifications

No published specifications for this item yet.

Questions about this item

What width clearance does the 2.125in wide padlock need for the shackle to pass through a hasp?

The padlock body is 2.125 inches wide, so the hasp opening must be at least that wide to accommodate the shackle and the protective solid-iron shroud.

How is the cylinder replaced on the Master Lock 6321 rekeyable padlock?

Use the control key to turn the cylinder plug, then pull the core out; a common error is forcing the core without fully rotating the control key to the stop position.

Which components can be swapped later on the 6321 padlock?

The rekeyable design allows the cylinder or shackle to be replaced individually if they become damaged or if keying needs change.

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