Conversion kit for 5/8" turnbuckle pin. ø13 mm pin and bushings. Eye/Fork The BBB40 Fiddle Block features

The BBB40 Fiddle Block features a large 40 mm primary sheave and a smaller secondary sheave for increased mechanical advantage in rigging systems

L-MAX: 321 mm

the wedge needs to be replaced

The Seldén BBB20 Triple/Becket block is a 20mm ball bearing block designed for control lines on dinghies and keelboats

Upper block: 405-001-11

Conversion kit for 5/8" turnbuckle pin. ø13 mm pin and bushings. Eye/Fork The BBB40 Fiddle Block featuresImportant note on 5 8" rigging screws Back in 1998 we changed the clevis pin diameter from 13 mm to 15. 8 mm. When upgrading to new rigging screws on a boat built prior to this change, the clevis pin will most likely be bigger than the chain plate hole. The 15. 8 mm clevis pin has to be replaced by one 13 pin and two bushings. This kit includes a 13 mm clevis pin and two stainless bushings.