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SCHAEFER Series 303 Aluminum Blocks

Use as sheet control blocks on dinghies, or for control lines on larger boats. High-impact Delrin® sheaves turn on polished stainless steel spacers, so the cheeks won't squeeze or bind the sheave, even under extremely heavy loads. Head shackles are stamped stainless steel with clevis pin and cotter ring. Cheeks are black hard-coated anodized aluminum. Straps, headclips, shackles, and rivets are tumbled and polished stainless steel.

  • Sheave: Delrin
  • Sheave Size: 1-7/16"
  • Line Diameter: 7/16"
  • Cheek Material/Finish: Aluminum
  • Safe Working Load: 1,000lb.
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Single Block with Shackle, 2.6oz. 128496 303-03
In stock online.

$54.99

Single Block with Swivel Shackle, 2.7oz. 128504 303-05
In stock online.

$59.99

Single Cheek Block on Flat Base, 2.5oz. 128512 303-09
In stock online.

$44.99

Double Block with Shackle, 4.1oz. 128546 303-23
In stock online.

$79.99

Double Block with Flat Base, 4.2oz. 10616399 303-29
In stock online.

$69.99

Single Cheek Block on Curved Base, 2.2oz. 128553 303-30
In stock online.

$34.99

Single Halyard Lift Block, 3.0oz. 128611 303-50
Delivery within 2 - 3 weeks.

$44.99

Product Description

Use as sheet control blocks on dinghies, or for control lines on larger boats. High-impact Delrin® sheaves turn on polished stainless steel spacers, so the cheeks won't squeeze or bind the sheave, even under extremely heavy loads. Head shackles are stamped stainless steel with clevis pin and cotter ring. Cheeks are black hard-coated anodized aluminum. Straps, headclips, shackles, and rivets are tumbled and polished stainless steel.

  • Sheave: Delrin
  • Sheave Size: 1-7/16"
  • Line Diameter: 7/16"
  • Cheek Material/Finish: Aluminum
  • Safe Working Load: 1,000lb.

Specs

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REVIEW SNAPSHOT®

by PowerReviews
SchaeferSeries 303 Aluminum Blocks
 
4.5

(based on 2 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

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    (0)

  • 1 Stars

     

    (0)

Reviewed by 2 customers

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5.0

so much superior to Garhauer OEM

By Monty 17

from Yakima WA

About Me Casual/ Recreational

Verified Buyer

Pros

  • Attractive Design
  • Quality Construction

Cons

    Best Uses

    • Sailing

    Comments about Series 303 Aluminum Blocks:

    Replacing several Garhauer components that came with new boat. Just wish boat manufacturer had charged us 30% more for Schaefer in the first place.

    (1 of 1 customers found this review helpful)

     
    4.0

    Solid and reliable

    By Iolanthe

    from San Francisco

    About Me Advanced

    Verified Buyer

    Pros

    • Attractive Design
    • Consistently reliable
    • Easy To Install
    • Easy To Use
    • Quality Construction

    Cons

      Best Uses

      • Large Boats
      • Sailing
      • Small Boats

      Comments about Series 303 Aluminum Blocks:

      I have Schaefer blocks all over my boat. Some are more than 10 years old. Maintenance has just been hosing them off or letting the rain do it. None have ever failed or exhibited excess friction. The price is right and the look fine.

      Displaying reviews 1-2

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