System 42 - Sliding Bolt Track, 2000 mm, Screw size M8, Recommended Spacing c-c Max 100 mm Swage Terminal/Eye The BBB20 Cheek Block is

The BBB20 Cheek Block is a 20mm ball bearing block designed for control lines on dinghies and keelboats

30 mm x 1000 mm long pin stop track with holes for M6 fasteners

42 mm x 4000 mm long standard track with holes for M10 fasteners

30 mm x 4000 mm long "Sliding Bolt" track

Polymer sheave and stiff glass fibre reinforced cheeks to prevent the line from jamming

System 42 - Sliding Bolt Track, 2000 mm, Screw size M8, Recommended Spacing c-c Max 100 mm Swage Terminal/Eye The BBB20 Cheek Block is42 mm x 2000 mm long "Sliding Bolt" track. A solid track with no holes for installation, but a groove where hexagon bolts and sealing washers slides in (not included). The bolts (M8, DIN standard) are inserted in the groove with sealing washers (164 483) fitted. Sealing compound is applied between the flanges of the washers. The track is then turned and mounted on deck. This way a retrofit upgrade to new tracks can be made without drilling new holes