Schaefer M-Series Block
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Schaefer M-Series Block

  • Single Block with Universal Head
  • Safe Working Load: 5000 lbs, Maximum Line Size: 5/8"
  • Average Boat Size: 45' to 60', Material: Aluminum
  • Item #: 
    Model #: 
    Shipping Weight: 
    0.80 Lbs.
    List Price: 
    Our Price:
    Note:  This item ships from the manufacturer.
    It typically ships within 2 business days  (more...)
    Status:     Ships Direct



    Schaefer M Series blocks are engineered with Schaefer quality and fabricated from machined hard coat anodized aluminum providing an incredible strength to weight ratio. M82 blocks are ideal for boats in the 45-60 foot range.


    • Universal head can swivel free or be locked into place
    • Hard coat anodized aluminum construction
    • High strength to weight ratio
    • Machined aluminum sheave
    • Torlon™ rollers and Delrin™ ball bearings
    • Computer machining


    • Safe working load: 5000lbs. (2270kg)
    • Maximum line size: 5/8" (16mm)
    • Pin diameter: 5/16" (8mm)
    • Sheave diameter: 3-7/32" (82mm)
    • Sheave width: 3/4" (19mm)
    • Length: 5-13/32" (160mm)
    • Width: 3-7/32" (82mm)
    • Thickness: 1-1/8" (28mm)
    • Weight: 12oz (340gm)
    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to

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  • Applications: Sails, Hulls, Rigging, Deck Hardware and Anything that Moves
  • Forms a Hard, Smooth, Ultra-Slick, Hydrophobic Dry Coating
  • Will Not Attract Dirt or Contaminants, Container: Quart
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