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Harken HK421 16 mm Through-Deck Block
Harken 16 mm Through-Deck Block is a small boat block designed for various control lines on high-tech dinghies.
Equipped with stainless steel balls in a grooved race, this block offers exceptional strength to weight ratio.
With a maximum working load of 113kg (250lb), it outperforms similar blocks in the market.
This block is versatile, suitable for dinghy control lines, leech lines, downhauls, travel controls, spinnaker pole trip lines, out-hauls, cunninghams, and pram halyards.
Featuring a hardened stainless steel inner race, it ensures durability even in demanding conditions.
The sheave diameter is 16mm (5/8") with a cutout of 11x35mm (7/16x1 3/8") and a length of 60mm (3/8").
It accommodates lines up to 5mm (7/32") in diameter.
With a breaking load of 544kg (1200lb), it offers reliability and peace of mind during use.
Despite its robust construction, it weighs only 18g (.63oz), ensuring minimal added weight to your rigging.
Specifications: InSheave Ø, mm
Length, mm
Weight, gr
Max Ø, mm Max working load, kg
Breaking load, kg
16 60 18 5 113 544 -