We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in

Master Lock

Master Lock 6121 Green Keyed Alike Door Lock

SKU CH-S74Q-NFJTA

Steel body padlock with boron alloy shackle and weather-resistant cover for outdoor use

  • TypeTraffic & Parking Lot
  • Keyed alike convenience simplifies multi-lock access
  • Green body colour enables quick visual identification
  • Laminated steel body resists outdoor corrosion
  • Boron alloy shackle withstands cutting attempts
  • Weather tough cover protects mechanism in exposed locations

Lockout Padlock for Outdoor Use

This green Master Lock 6121 padlock is built for traffic and parking-lot environments where multiple locks must share one key. Its laminated steel body and boron-alloy shackle resist cutting and prying while the weather-tough cover shields the mechanism from rain and grit. Facility managers and maintenance crews can standardise on a single key across dozens of points.

Laminated Steel Body with Boron-Alloy Shackle

The 16-layer laminated steel body distributes impact force and resists drilling, while the 5/16-inch boron-alloy shackle adds high tensile strength. An open shackle design provides 7/8-inch clearance for thick hasps or chains, and the non-removable keyed-alike cylinder prevents accidental key loss during daily lockout routines.

Keyed-Alike System Limits Key Management

Every lock in the set operates from the same key, so one person can secure or release many isolation points quickly. This convenience means a lost key compromises every padlock in the group, making the system unsuitable for areas that require individual accountability or unique key codes per lock.

Highlights

  • Keyed alike convenience simplifies multi-lock access
  • Green body colour enables quick visual identification
  • Laminated steel body resists outdoor corrosion
  • Boron alloy shackle withstands cutting attempts
  • Weather tough cover protects mechanism in exposed locations

Specifications

BrandMASTER LOCK
TypeTraffic & Parking Lot

Questions about this item

Is the 6121 padlock keyed alike with other Master Lock units of the same model?

Yes, the 6121 is supplied as keyed alike so every lock in the set opens with the same key.

What shackle diameter and clearance does the 6121 need to fit a standard hasp?

The shackle is 5/16 in diameter and provides 7/8 in clearance across the shackle for typical hasp holes.

How do you fit the 6121 and what step is often missed?

Insert the shackle through the hasp, push the body down until it clicks, then remove the key; forgetting to fully seat the body before turning the key leaves the lock unsecured.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.