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Black rectangular steel padlock with boron alloy shackle, laminated finish, keyed alike

Master Lock

Master Lock 6121KA-10G105 padlock

SKU CH-X82W-TANQH

Keyed-alike padlock with a boron-alloy shackle, laminated steel body and five-pin cylinder for weather-resistant security

  • Product typeMechanical Push Button
  • Keyed-alike convenience with a single 10G105 key
  • 5-pin cylinder resists picking and bumping
  • Boron-alloy shackle withstands cutting and prying
  • Laminated steel body endures harsh weather
  • Rekeyable design extends service life

Master Lock 6121KA-10G105 Padlock

The Master Lock 6121KA-10G105 is a rectangular steel padlock designed for securing gates, sheds and storage units. It suits users who need several locks operated by a single key. The laminated body and boron alloy shackle resist cutting and prying attempts. Weather-resistant construction allows reliable outdoor use year-round.

Keyed-alike convenience and shackle fit

All locks in the set open with key number 10G105, removing the need to manage multiple keys. The standard shackle measures 5/16 in diameter with a 1 1/8 in height and 7/8 in clearance. Verify that the shackle diameter fits your hasp or chain link before purchase. The five-pin cylinder is rekeyable by a locksmith if key control needs change later.

Master K6000 keyway compatibility

The cylinder uses the Master K6000 keyway, so only keys cut to that profile will operate the lock. Existing Master Lock keys with different keyways will not work. Buyers who need integration with a different key system should choose a model matching that specific keyway.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 64% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMaster Lock
Product typeMechanical Push Button

Questions about this item

How can I confirm the padlock is working correctly after installation?

Insert key number 10G105 and verify the shackle releases smoothly; the 5-pin cylinder should turn without binding and the boron alloy shackle must latch securely when pushed shut.

What comes in the package and what must be purchased separately?

The box contains the rectangular laminated steel padlock with its standard shackle; no additional keys, mounting hardware or lubricant are included and must be sourced separately.

Which version should I choose if I need multiple locks operated by one key?

Select the keyed-alike 6121KA-10G105 model; every unit in this series opens with the same key number 10G105 so a single key operates all locks.

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