A popular use for this block is for the mainsheet deck block on the Catalina 310, Catalina 320, Catalina 34, and Catalina 36 installed near the base of the mast.
It is also appropriate for a spinnaker sheet blocks on the Catalina 30.
We have these blocks fabricated with special Torlon high load bearings to provide a working load of 2800 pounds. The 2-5/8" diameter sheave will handle line up to 1/2" in diameter.
• Sheave diameter: 2-1/2"
• Line diameter: 1/2"
• Bearings: Torlon
• Working load: 2800 pounds
• Fasteners: 1/4"
• Mounting pad diameter: 2-3/4"
• Fastener hole pattern: 1-7/8" diameter matches early Merriman block's hole pattern.
Considering the stainless steel fasteners that secure a mainsheet block to the deck is threaded into an aluminum plate, we highly recommend you apply MareLube Tef 45 (offered below under "May we also suggest) to both the male and female threads before reinstallation. This will help prevent electrolytic corrosion that occurs when these two metals are in contact. It will make it possible to remove the bolts in the future without damage to the threads in the aluminum plate.