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Master Lock 3MK SG400 Master Key Padlock 


  • Commercial Grade Padlock Features Protection from Drilling & Prying
  • 1-9/16" (40mm) Wide Reinforced Laminated Steel Body for Superior Strength
  • 3/4" (19mm) Hardened Steel Shackle (9/32" diameter) for Extra Cut Resistance
  • Dual Ball Bearing Locking for Maximum Pry Resistance
  • Non-Rekeyable, 4-pin W1 Cylinder Helps Prevent Lock Picking
  • Keying: Pre-Keyed to Existing Master Key System MK# SG400 (MK-KD)
  • Change Keys: Each Lock Will Come With 2 Change Keys (KD)
  • Master Keys: SG400 Master Keys are Sold Separate (MK)
  • Specs_Width: 1-9/32" Wide; A: 9/32" (7mm) B: 3/4" (19mm) C: 5/8" (16mm)
  • Delivery: All Special Key Number Orders Have a 12-15 Day Factory Lead Time and Are Non-Returnable  


For 3MK Extra Cut Change (KD) Keys

Cut Master Keys for 3MK-SG400 Padlocks


Master Lock 3MK SG400 Laminated Steel Padlocks

  • Body Material: Reinforced laminated steel body
  • Shackle Material: Hardened steel shackle
  • Packaging: Commercial Boxed
  • Shelf Pack Quantity: 6
  • Master Carton Quantity: 24
  • Color: Steel
  • Body Width:1-9/16in (40mm)
  • Shackle Length: 3/4in (19mm)
  • Shackle Width: 5/8in (16mm)
  • Shackle Diameter: 9/32in (7mm)
  • Keying: Master Keyed to MK# SG-400
  • Keys: 2 Keys per Lock; SG400 Master Keys Sold Separate

Master Lock 3MK SG400 Master Keyed Padlock (3MK-KD-SG400)


Master Lock No. 3MK SG400 Padlock: Master Lock 3-MK-SG400 Laminated Steel Pin Tumbler Commercial Grade Padlocks. Keying: Master Keyed to MK# SG400.