Harken® 40mm Swivel Carbon Fiddle Block Swivel, Becket
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Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an excellent choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets, as well as for controls such as cunninghams and internal boom outhauls on larger boats.
| Sheave Ø (mm) | 40 mm |
| Sheave Ø (in) | 1 9/16 in |
| Length (mm) | 131 mm |
| Length (in) | 5 1/8 in |
| Weight (g) | 54 g |
| Weight (oz) | 1.9 oz |
| Shackle pin Ø (mm) | 4 mm |
| Shackle pin Ø (in) | 5/32 in |
| Maximum line Ø (mm) | 10 mm |
| Maximum line Ø (in) | 3/8 in |
| Maximum working load (kg) | 220 kg |
| Maximum working load (lb) | 485 lb |
| Breaking load (kg) | 735 kg |
| Breaking load (lb) | 1620 lb |