Ronstan Series 20mm Single Loop Head BB Block, Becket Perko Turned 5/16" thread x 1"

Turned 5/16" thread x 1" long stud

Tests prove that Shell ROTELLA® T4 Triple Protection resists oxidation up to 50% longer than the previous generation of Shell ROTELLA® T Triple Protection

Self-trimming case eliminates need for mounting panels or trim bezels

Ignition switches are usually operated by a coded key and tumbler lock

Ronstan Series 20mm Single Loop Head BB Block, Becket Perko Turned 5/16" thread x 1"Precision moulded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance & low friction. Can be fitted with a shackle in either of two planes to allow correct alignment of the block. Applications Dinghy control lines Dinghy vangs Cunninghams Traveller controls