Single Wire Block, Ferrule Eye with 3/4″ Sheave Dia., 1/8″ Max. Wire

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SKU: RF560 Categories: ,
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Light-weight economical blocks for wire-rope control lines.

Not all control line blocks on a boat require two-stage bearings that evolve from years of R&D—and the expense that goes with them. Sometimes the system just needs a simple, but solid block. Utility blocks are just the answer for these situations, but Ronstan takes simple a step further by using top quality materials. Commonly used for dinghy applications, these blocks feature 316 stainless steel cheeks for strength and superior corrosion resistance. UV stable acetal sheaves provide durability for a long service life. Each block is riveted together and requires virtually no maintenance—just a little rinse now and again. The rivets are hollow and can be used to fasten the blocks with screws, shackles or lashed. For extra purchase the rivet can be used as a becket. There is a utility block for almost any light to moderate load application. Explore the possibilities with confidence using Ronstan utility blocks.

This 20mm single block is designed for use with wire-rope. The Nylatron® sheave has a profile that aligns up to 1/8″ wire. Ideal for backstay and halyard systems that use a wire-rope component.

Key Features

  • Solid simple standard bearing block
  • 316 stainless steel cheeks for strength and superior corrosion resistance
  • Nylatron® sheave handles up to 1/8″ wire
  • Maintenance-free
  • Riveted together
  • Can be mounted using fasteners, shackles or lashed
  • Ideal for:
    • Backstay systems
    • Halyard systems
    • Trapeze systems

Additional information

Sailboat Blocks

Wire Blocks

Ball Bearings Plain Bearings
Becket No Becket
Diameter 1/8 Inch or 3 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Fixed Lashing Eye
Ratchet Non Ratcheting
Safe Working Load 550 Pounds
Type Single
Weight 0.7 Ounce
Sheave Diameter 20 mm
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