The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. The 404 uses an O-ring to keep the line in the sheave during intermittent loading.
Sheave Ø (mm)16 mm
Length (mm)29 mm
Weight (g)10 g
Maximum line Ø (mm)5 mm
Maximum working load (kg)113 kg
Breaking load (kg)544 kg
DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.