One Design Parts

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...

The bailer plug fits into the top of the ISCA bailer assembly to control the flow of water exiting the cockpit. Rubber construction for long life and ease of use.  Bailer Plug 4 1/2 inches long Zim Sailing Part # 48134 This is an official...

Official replacement bailer cap for ISCA sailboats. This is the 'long' style 1-5/16 inch cap found commonly on boats produced prior to 1972. 1-5/16″ in length Official replacement fitting Threads into existing bailer assembly  Zim Sailing...

Replacement bailer housing for the ISCA sailboat. Durable plastic construction.  Bailer Housing Zim Sailing Part # 48131 This is an official International Sunfish Class Association™ (ISCA®) class approved fitting. Zim Sailing is the...

Sail rings are a traditional way of attaching your ISCA sail to the booms. Preferred by recreational and casual sailors for their ease of use, we offer these in a convenient 30 pack.  Plastic Sail Rings 30 pack Zim Sailing Part # 48130 This is an...