ISCA Spar Parts

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. Compatible with older Sunfish® and lateen rigged sailboats. End Cap w/ Double...

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. Compatible with older Sunfish® and lateen rigged...

Made adjustments to your gooseneck assembly a breeze with this handy quick adjust lever. This lever replaces the bolt and allows you to slide the gooseneck back and forth on the lower boom more easily to tune your rig. Compatible with older...

Stainless steel eyestrap, commonly used for boom blocks on ISCA sailboats.

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 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...

Item Discontinued - Shop All Blocks This is the furthest aft block on the Sunfish boom. Equipped with a swivel for smooth action of the mainsheet as it's pulled in. Original Equipment

Replacement upper or top mast cap for the ISCA / Sunfish 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...

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...

Replacement ISCA / Sunfish 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...

Interlocking eyebolts with nuts for the ISCA boom assembly. These eyebolts connect the forward end of the lower boom and the lower end of the upper boom. Includes lock nuts.  Interlocking Eyebolts Includes Nuts Zim Sailing Part # 41006 This...

Replacement Gooseneck Assembly for ISCA / Sunfish 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.  Gooseneck...