The 639 is a simple swivel base for main and jib sheets on very small boats or for control lines on boats of all sizes.
|Height||75 mm||1 15/16 in|
|Weight||259 g||9.14 oz|
|Minimum line Ø||3 mm||1/8 in|
|Maximum line Ø||12 mm||1/2 in|
|Fastener spacing||26 mm||1 1/32 in|
|Fasteners||M5 FH||#10 FH|
|Maximum working load||136 kg||300 lb|