Schaefer Marine 505-05 Single Block 51mm Delrin Sheave Stainless Steel

The Schaefer Marine 505-05 is a high-performance single block featuring robust stainless steel cheeks and a Delrin™ plain bearing sheave for smooth, reliable operation under load. Designed for sailboat running rigging, control lines, and other marine applications, this compact block delivers an impressive 1,750 lb safe working load while maintaining a lightweight profile.

Key Features:

• Stainless steel cheek plates provide exceptional strength and corrosion resistance in harsh marine environments
• Delrin™ plain bearing sheave ensures low-friction operation and high load capacity
• 51mm (2") sheave diameter accommodates line up to 7/16" (11mm)
• 1,750 lb (795 kg) safe working load suitable for mainsheets, halyards, and control lines
• Compact dimensions: 4 13/32" length × 2 1/8" width × 15/16" thickness
• Lightweight construction at just 7.1 oz (201 g)

Schaefer Marine's 5 Series blocks are engineered for durability and performance, making them ideal for cruising and racing sailors who demand reliability. The plain bearing design provides maintenance-free operation while the Delrin sheave material resists UV degradation and saltwater corrosion.