One Design Parts

The standard boom block is mounted to the mid point of the ILCA boom. Pass your mainsheet up from your mainsheet block, through the boom block, and then aft to the boom block with becket to complete your rigging. Attaches to the boom with the stainless...

The boom block with becket is attached to the aft end of the ILCA boom. Pass your mainsheet through the block, down to the traveler block, and back up to secure to the becket. A great upgrade for an older boat, particularly for light air sailing!...

The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race. Sheave 16 mm / 5/8 in Length: 54 mm / 2 1/8...

Nylon wear protection pads for the ILCA dinghy. Designed to stop the mainsheet blocks from damaging the deck of the boat. The wear protectors clip around the traveler fairlead and are held in place by friction and the traveler rope. There is no overhang...

This Harken block has a main 40mm sheave and a 29mm fiddle below it. This part is popular with opti sailors for making their mainsheet 4:1. 

Block Plate, w Blocks, Harken for the ILCA Sailboat. 

Drain Bushing Assy, ILCA LP Part # 91284 LP Part # 91284

The 433 Dinghy Clew Hooks are designed for ILCA and other loose-footed dinghies. It installs permanently on the boom and allows you to instantly attach your sail in high wind and waves. Weight - 0.65oz Harken Part # 433

Upgraded 40mm traveler block for the ILCA. Class legal. Built by Harken. LP Part # 91451

Upgraded 40mm boom block for the ILCA. Class legal. Built by Harken. LP Part # 91449

Upgraded 40mm boom block with becket for the ILCA. Class legal. Built by Harken. LP Part # 91450

Block, 25mm, Wire, Fork Mount Harken Part # 466