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Rectangular brass padlock with long shackle, keyed alike 10G145

Master Lock

Master Lock 6840 Keyed Alike Padlock 10G145 Long Shackle Rectangular Brass Body

SKU CH-Z801-ZT90B

Keyed-alike padlock with a 5-pin cylinder, boron-alloy shackle and weather-resistant brass body

  • TypeMechanical Push Button
  • Keyed alike convenience opens multiple locks with one key
  • 5-pin cylinder with Master K6000 keyway resists picking
  • Boron alloy shackle provides high-security cut resistance
  • Solid brass body withstands outdoor weather exposure
  • Rekeyable design allows cylinder changes when needed

What This Padlock Is And Who It Is For

The Master Lock 6840 is a rectangular brass padlock with a long boron-alloy shackle. It opens with key number 10G145 and uses a five-pin Master K6000 keyway. The keyed-alike configuration means every lock in the set works with the same key, simplifying access for maintenance staff, facility managers or anyone securing multiple points with one credential.

Behaviour Under Sustained Use

The brass body and boron-alloy shackle resist cutting and corrosion, so the lock remains operable after prolonged outdoor exposure. Weather-resistant construction prevents internal mechanisms from seizing during rain or humidity cycles. The five-pin cylinder is rekeyable, allowing a locksmith to change the combination without replacing the hardware if key control requirements shift over time.

What To Check Before Ordering

Verify that the shackle diameter of five-sixteenths inch and the internal clearance of twenty-five thirty-seconds inch by two and a half inches fit the hasp, chain or gate you intend to secure. Confirm that the rectangular body measuring two and five-sixteenths inch high by one and three-quarters inch wide by one inch thick clears the mounting surface. Ensure the keyed-alike arrangement matches your existing key number 10G145 if you are adding to a current system.

Highlights

  • Keyed alike convenience opens multiple locks with one key
  • 5-pin cylinder with Master K6000 keyway resists picking
  • Boron alloy shackle provides high-security cut resistance
  • Solid brass body withstands outdoor weather exposure
  • Rekeyable design allows cylinder changes when needed

Specifications

BrandMaster Lock
TypeMechanical Push Button

Questions about this item

Does the 6840 padlock generate any noise, heat or consume power when left locked outdoors all day?

The 6840 is a purely mechanical padlock with a brass body and boron alloy shackle, so it produces no noise, generates no heat and requires no power to operate.

What existing key or cylinder must I already own for the 6840 keyed-alike 10G145 to work with my current locks?

You need an existing lock that uses the Master K6000 keyway and is keyed to the 10G145 key code for the 6840 to operate with the same key.

Will the 6840 with its 5-pin cylinder and rectangular brass body fit the same hasp or chain I use with older Master Lock padlocks?

The shackle diameter is 5/16 in, height 2 1/2 in and width 25/32 in, so it will fit existing hardware that accepts those dimensions.

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