Ronstan Series 15 BB Block, Upright Lead

aps price $18.95
In Stock Now

The RF15171 single upright lead mount BB block with is one of Ronstan’s Series 15mm ball bearing utility blocks, the smallest and lightest ball bearing blocks available. Its low friction and high performance comes from a precision-moulded acetal sheave running on a stainless steel ball bearing.

It is typically used for: dinghy control lines; vangs, cunninghams, and tweakers; and shock-cord tensioning systems.

Key Features:

  • Single sheave
  • Upright lead, keeps lines close to the deck
  • Small and light
  • Low friction
  • UV-stabilized plastic sheaves
  • Stainless steel ball bearings
  • Grade 316 stainless steel cheeks
More Information
Breaking Load (lbs) 1210
Breaking Load (kg) 550
Max Line Size (in) 3/16
Max Line Size (mm) 5
Safe Working Load (lbs) 260
Safe Working Load (kg) 120
Screws (in) 5/32
Screws (mm) 4
Sheave Diameter (in) 5/8
Sheave Diameter (mm) 15
Weight (oz) 0.3
Weight (g) 9
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