RONSTAN
Series 29 Utility Fiddle Block with Rivet Eye and V-Jam Cleat

$30.95

In stock online.
+
Model # 121152 | Mfg # RF187 | UPC # 9316800068180

Light-weight economical blocks for 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 29mm fiddle block with jam cleat is ideal in a wide range of systems that provide a 4:1 or better purchase and are not cleated remotely. Great for boom vangs, internal outhaul systems, backstay systems and more.

Key Features

  • Solid simple standard bearing block
  • 316 stainless steel cheeks for strength and superior corrosion resistance
  • Acetal sheaves offer UV resistance
  • Maintenance-free
  • Riveted together
  • Can be mounted using fasteners, shackles or lashed
  • Ideal for:
    • 4:1 systems
    • Boom vangs
    • Backstay systems
    • Halyard tuning systems
    • Outhauls

Ronstan Utility Block Selection Guide

Sheave DiameterLine Compatibility
19mm3/16" (5mm)
25mm3/8" (10mm)
29mm5/16" (8mm)

Specs

Series 29 Utility Fiddle Block with Rivet Eye and V-Jam Cleat

Name Value
Ball Bearings Plain Bearings
Becket No Becket
Diameter 5/16 Inch or 8 mm
Direction Any
Integral Cleat Integral V-Jam
Mount Type Fixed Lashing Eye
Ratchet Non Ratcheting
Safe Working Load 660 Pounds
Sheave Diameter 29 mm
Type Single Fiddle
Weight 2.1 Ounces

Advice

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

Related West Advisor Articles

Reviews

Product Q & A

RETURN TO TOP