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.
Use for: Wire halyards, Vangs and Control lines.
Part Number: 313
|Sheave Dia.||1 1/2"||38 mm|
|Weight||3 oz||85 gr|
|Max Wire Dia.||1/8"||3 mm|
|Max Line Dia.||3/16"||5 mm|
|Shackle Pin Dia.||1/4"||6 mm|
|Maximum Working Load||1500 lbs||680 kg|
|Breaking Load||3000 lbs||1361 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