One Design Parts

Official class approved upper boom for the ISCA sailboat. This upper boom includes end caps and is standard on all Zim ISCA Race and Club sailboats. ISCA Lower Boom Includes end caps Aluminum construction  Zim Sailing Part # 48142 Freight Shipping...

Rudder Cheek for the ISCA sailboat. This is an updated design found exclusively at Zim Sailing, offering stronger, more durable plastic for long life. Includes pintle pin and spring.  Rudder Cheek Includes Pintle Pin & Spring Zim Sailing Part #...

Official replacement bailer cap for ISCA sailboats. This is the 'short' style 13/16 inch cap found commonly on boats produced since 1972 and standard on all new Zim ISCA sailboats. This is the cap only. 13/16″ in length Official replacement...

Standard 2 loop traveler bridle for ISCA sailboats. Made from a marine grade stainless wire with vinyl coating for long life. Attaches to traveler fairleads and provides a place for tying off or securing your mainsheet. Standard on all new Zim ISCA...

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...