Master Lock 6420 Pro-Series Wide Weather Tough Rekeyable Interchangeable Core Padlock

SKU # MA6420

The Master Lock No. 6421/6427 ProSeries® Weather Tough® Covered Laminated Padlock features a 2-1/8in (54mm) heavy steel body to withstand physical attack hardened boron alloy shackle for superior cut resistance. Padlock is available without core – accepts standard SFIC OEM cores. The exclusive cover protects from water, ice, dirt and grime.

G.S.A. Contract Holder
This item is available on our
GSA contract # 47QSWA19D001W
Pricing varies based on options selected below.



  • Ideal for harsh outdoor conditions - exclusive Weather Tough® cover protects lock from water, ice, dirt and grime
  • ProSeries® Padlocks are designed for Commercial/Industrial applications
  • Heavy steel body withstands physical attack
  • Hardened boron alloy shackle for superior cut resistance
  • Dual ball locking mechanism resists pulling and prying
  • Lock supplied without core. Accepts standard SFIC OEM 6- and 7-pin cores.
To top