Harken 16mm Narrow Block - Bronze Sheave.  Part NumberSheave DiameterLengthMax. Line DiameterMax. Working LoadBreaking LoadWeight HKN-484 16mm 37mm 4mm 113kg 339kg 15g

Harken 114mm Sheave Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of hardcoat-anodized, PTFE-impregnated 6061-T6 aluminum,...

Harken 16mm Sheave Self-contained sheaves are designed for sailors to use in custom applications. 16 mm AirBlock® sheaves are Delrin® and feature stainless ball bearings that ride in a grooved race...

Harken 25mm Wire Sheave Self-contained sheaves are designed for sailors to use in custom applications. Wire sheaves ride on high-load composite bearings. They are hardcoat-anodized aluminium with...

Harken 22mm Micro Sheave Self-contained sheaves are designed for sailors to use in custom applications. The Micro, Bullet, and Big Bullet sheaves are Delrin® with Delrin® ball bearings. They are...

Harken 38mm Wire Sheave Self-contained sheaves are designed for sailors to use in custom applications. Wire sheaves are Hard Lube-anodised aluminium that ride on high-load composite bearings...

Harken 29mm Bullet Sheave Self-contained sheaves are designed for sailors to use in custom applications. The Micro, Bullet, and Big Bullet sheaves are Delrin® with Delrin® ball bearings. They are...

Harken Midrange Sheave, 51mm Self-contained sheaves are designed for sailors to use in custom applications. Midrange sheaves come in either Delrin® or aluminum for wire. Delrin® is a registered...

Eyestraps are useful accessories. They form light-duty mounting bases for blocks, serve as lash-down points, and can be used for fairleads. Note: DO NOT use Harken equipment for human...