Two (2) of these masthead sheaves were used on the Catalina 320 standard and in mast furling masts. The 320 also used four (4) smaller 50 mm sheaves in the masthead, part number Z2439, shown below in the "May we also suggest".
The Catalina 34 and Catalina 36 in mast furling rigs used two (2) of these sheaves along with six (6) of the 85mm sheaves, part number T1961 in the masthead. These other sizes are shown below in the "May we also suggest".
The early Catalina 42 used a Isomat rig. This rig has a boom that used several of these sheaves for both the outhaul and the reef lines, both in the gooseneck and the boom end fitting.
Be sure to compare the dimensions of your sheaves to those listed below before ordering.
Boats that used this sheave:
• (2) per Catalina 320 masthead for non furling rigs
• (2) per Catalina 320 masthead for in mast furling rigs
• (2) per Catalina 34 masthead for in mast furling rigs
• (2) per Catalina 36 masthead for in mast furling rigs
• (6) per Catalina 42 outhaul and reef in boom (early 90's and early non furling Isomat NG-80 rig only)
• Outside diameter: 60 mm (~2-5/16")
• Inside diameter: 10 mm (~3/8")
• Width: 14 mm (~9/16")
• Line diameter: 3/8"
Since these spars are French, all of their products are metric. The fractional dimensions provided are the nearest equivalents.
