Description
The Harken 1.00 Single Wire Block (Model 300 w/ Becket or 312 w/out Becket) features a hard‑coat anodised, Teflon‑impregnated 25 mm sheave supported by high‑load composite bearings. Designed for ultra‑low friction, it performs reliably under heavy use while minimizing drag :contentReference[oaicite:1]{index=1}.
This lightweight block is built for wire halyards and thin control lines on sailing boats of all sizes, using composite thrust washers for smooth operation. The fixed stainless steel shackle (5 mm pin) ensures secure attachment and robust performance :contentReference[oaicite:2]{index=2}.
Specifications
Sheave Diameter: 25 mm (1.00 in)
Weight: 28–35 g (1–1.25 oz)
Wire Capacity: up to 2 mm (3/32 in)
Line Capacity: up to 4 mm (5/32 in)
Shackle Pin: 5 mm (3/16 in)
Maximum Working Load: 454 kg (1,000 lb)
Breaking Load: 907 kg (2,000 lb)
Part Number: 300 or 312 (with/without becket)
