One Design Parts

Replacement metal bow handle for ISCA sailboats. Mounted to the bow of the ISCA, the bow handle provides a handy lift point for your boat and place to tie off a line. Mounts to the deck with screws (not included). Official ISCA replacement fitting Zim...

Replacement bailer o rings for ISCA sailboats. The o ring helps to provide a watertight seal between the bailer and the boat, preventing leaks. Sold as a 5 pack and a great item to keep in your spare parts bag! ISCA bailer o rings Sold in a 5 pack Zim...

Replacement boom block with swivel for ISCA sailboat booms. This is the standard Race Lite version. ISCA Boom Block w/ Swivel Zim Sailing Part # 48160   This is an official International Sunfish Class Association™ (ISCA®) class approved...

Replacement boom block for ISCA sailboat booms. This is the standard Race Lite version that is fixed (ie, does not swivel). ISCA Boom Block (Fixed) Zim Sailing Part # 48159   This is an official International Sunfish Class Association™...

Replacement Gooseneck Assembly for ISCA sailboats. The gooseneck provides attachment between the ISCA mast and the ISCA lower boom. Add a quick adjust lever (not included) for easy on the water adjustments to your rig or use a standard nut and bolt (sold...

Replacement upper or top mast cap for the ISCA sailboat. This plastic fitting includes a hole for the halyard to pass through. Cap is typically mounted to the mast with a rivet or pin.  Upper / Top Mast Cap Plastic Fitting Zim Sailing Part #...

Replacement lower mast cap for the ISCA sailboat. This is the plastic fitting mounted to the bottom of the ISCA mast to help prevent wear in the mast step. This is a plastic fitting and standard on all new Zim Sailing ISCA masts. Lower / Bottom Mast...

Replacement ISCA sailboat boom end cap without eye. This cap is mounted to the forward end of the boom. Plastic Fitting Zim Sailing Part # 48155 This is an official International Sunfish Class Association™ (ISCA®) class approved fitting. Zim...

Replacement boom end cap for the ISCA sailboat. This 'Double Eye' version is used at the aft end of the lower boom to accommodate the outhaul rigging.  End Cap w/ Double Eye Durable Plastic Construction Zim Sailing Part # 48154 This is an official...

Replacement ISCA sailboat boom end cap with single eye. This cap is mounted to the aft end of the upper boom. Plastic Fitting Zim Sailing Part # 48153 This is an official International Sunfish Class Association™ (ISCA®) class approved fitting...

The wood rudder blade is a great option for the recreational or casual ISCA sailor, offering a strong, long lasting blade that is less expensive than the standard fiberglass racing blades. Designed to work with existing ISCA rudder cheeks.  Wood...

Wood daggerboard for the ISCA Sailboat. Designed to the same dimensions as the standard fiberglass daggerboard but a less expensive solution for the casual ISCA sailor.  Wood Construction Zim Sailing Part # 48147 This is an official International...