Harken 1.00 Single Wire Block

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Lightweight, low-friction Harken wire blocks carry wire halyards and high-strength control lines on boats of all sizes. High-load composite bearings carry axial loads. Hardkote-anodized Teflon® impregnated sheave for strength and corrosion resistance. 25 mm (1.00 in) wire blocks use low-friction thrust washers. 38 mm (1.50 in) and 51 mm (2.00 in) wire blocks feature sideload balls between the sheave and the sideplate to minimize friction from unfair leads. 466 Features a forkhead and becket making it useful for vangs, halyards and control lines.

Use for: Wire halyards, Vangs, Control lines.

Part Number: 300




Sheave Ø

1 in

25 mm


1 oz

28 g

Max Wire Ø

3/32 in

2 mm

Max Line Ø

5/32 in

4 mm

Shackle Pin Ø

3/16 in

5 mm

Maximum Working Load

1000 lb

454 kg

Breaking Load

2000 lb

907 kg


Need help to design your Harken system - take a look here for the Harken System Guides and Drawings
Or perhaps you need some other information (load calculators, block selectors, service instructions or manuals)?   Take a look here for all the official Harken Support Information