Sku : 6421WO


Master #6421 Weather Tough Steel Interchangeable Core Pro Series Padlock; Boron Alloy Shackle
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Master #6421KA

Body Width: 2 1/8"
Shackle Diameter: 5/16"
Shackle Vertical Clearance: 1 1/8"
Shackle Horizontal Clearance: 7/8"

Steel Weather Tough Lock Body with Boron Alloy Shackle

Available with the following keyways:

Standard SFIC Keyway, Arrow Lock 1C Keyway, Arrow Lock 1D Keyway, Best Lock A; B; C; D; E; F; G; H; J; K; L; M; Q Keyways

Core sold separately. Core finish available in Satin Brass or Satin Chrome

Control Keys Sold Separately

***Because of the number of options available with this product, we find that it's best to place your order with one of our product specialists. Please call 800-461-0620 to order this product. OR you can place your order online and we will gladly contact you to discuss your specific needs***


The 6421, as with most Master Lock Pro Series padlocks, is available with MANY additional options to choose from. To order this product with one or more of the following options, please call 800-461-0620 and speak with one of our product specialists.

Chain and collar installed for loss and theft prevention. Add $5.21 per lock. (Will also require additional shipping time)

Master Keyed systems (one key opens several groups of differently keyed locks). Add $3.50 per lock (Master Keys must be purchased separately)

Key Retaining cylinders (Key cannot be removed with lock in the open position). NO ADDITIONAL CHARGE but may increase shipping time

Custom laser engraving on up to 4 different areas of the lock body. Add $.75 - $3.00 per lock (Minimum order of 48 locks for laser engraving).

Call 800-461-0620 for details