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Master Lock No. 6121 Weather Tough Lock 

  • Keying:Keyed Different (KD), Keyed Alike (KA) or Master Keyed (MK) 
  • Specs_Width: 2-1/8" Wide; A: 5/16" (8mm) B: 1-1/8" (29mm), 1-1/2" (38mm), 2-1/2" (64mm) or 5-5/8" (143mm); C: 7/8" (22mm)
  • Best Used For: Severe Use on Construction Sites & Equipment; Security Gates & Fences; Trailers, Trucks & Towing 


For No. 6121 Extra Cut Keys

Master Keys for No. 6121MK Locks

    Master Lock No. 6121 Pro Series Locks

    • Body Material: Heavy Steel Body
    • Shackle Material: Hardened Boron Alloy
    • Packaging: Commercial Boxed
    • Shelf Pack Quantity: 6
    • Master Carton Quantity: 24
    • Color: Black
    • Body Width:2-1/8"(54mm) Wide
    • Shackle Height:1-1/8", 1- 1/2" (LF), 2-1/2" (LJ) or 5-5/8" (LN) 
    • Shackle Width: 7/8-Inch (22mm)
    • Shackle Diameter: 5/16-Inch (8mm)
    • Keys: 2 Keys Per Lock; Master Keys Sold Separate
    • Keying: Keyed Different (KD), Keyed Alike (KA) or Master Keyed (MK)
    • Key Function:Non-Key Retaining; Must specify "NR" for Non-Removable Key

    Master Lock No. 6121 Pro Series Locks


    Master Lock No. 6121 Lock: Master Lock 6121 Series Locks, 2-1/8" Wide Pro Series Weather Tough Padlocks Ideal for Harsh Conditions. Keying: Keyed Different (KD), Keyed Alike (KA) or Master Keyed (MK); Choose Shackle: 1-1/8", 1-1/2", 2-1/2" or 5-5/8".