High Security Padlocks

ASSA padlocks are used in a wide variety of applications including storage rooms, perimeter fences, and armories and feature the same level of patented key control as all ASSA high security cylinders. Our heavy duty padlocks are made from the highest quality materials and have withstood the most rigorous testing procedures. The Class 2 padlock features a body made of chrome plated extruded brass with a rust resistant case hardened steel shackle. The Number 3 padlock features both a case hardened steel body and shackle capable of standing up to more than 3 1/2 tons of force. The locking mechanism utilizes two case hardened steel balls and there are no external rivets or screws. Each model has weep holes for positive water drainage and protection from ice buildup.



  • Sturdy design ensures maximum durability
  • Class 2 available in key retaining and non-key retaining, extended and shrouded shackle
  • Class 3 available with extended and shrouded shackle
  • Class 4/5 available in with shrouded shackle
  • Shackle made of rust proof hardened steel
  • Hockey Puck style shackleless design provides maximum protection against hacksaw and bolt cutter attacks
  • Drain holes to prevent freezing
  • No external screws or rivets
  • Patented key control


  • ASSA warrants its padlocks against defective workmanship or wear resulting from defects for one year


  • All ASSA Padlock cylinders are U.L. 437 listed

Technical Information:

  • Class 2 body extruded brass, stainless steel shackle, tensile strength 1.5 tons
  • Class 3 body case hardened steel, stainless steel shackle, tensile strength 4.5 tons
  • Class 2 convertible from key retaining to non-key retaining
  • Hockey Puck style body can withstand up to 10,000 lbs of force from bolt cutters
  • Stainless steel top pins
  • Bottom pins and master pins are nickel silver

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