2022 Ronstan Marine Catalogue - VIEW CATALOGUE

Custom Products

PHOTO CREDIT:© Najad Yachts of Sweden

B030-0851 Series 30 halyard block

Product Type:


Part Number:



1000 kg 2204 lb


2000 kg 4409 lb


0.113 kg 0.25 lb

Product Features:

This series 30 halyard block is used for direct attachment to the headboard plate via the 8mm shackle pin to the mainsail of yachts up to approximately 45 ft loa. The mainsail halyard then passes through the 30mm st.steel sheave and is then dead ended at the top of the mast. The 2:1 mechanical advantage reduces the effort required to hoist the sail by nearly half.(there is small loss due to friction). The block body is machined from Al.alloy and anodised black.