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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
Sheave Ø (in)
5/8 in
Length (mm)
29 mm
Length (in)
1 1/8 in
Weight (g)
10 g
Weight (oz)
0.33 oz
Maximum line Ø (mm)
5 mm
Maximum line Ø (in)
7/32 in
Maximum working load (kg)
113 kg
Maximum working load (lb)
250 lb
Breaking load (kg)
544 kg
Breaking load (lb)
1200 lb
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