Use the 237 and 339 where there is little deflection in the line such as when routing a spinnaker pole foreguy aft along the cabin house.

A (mm)
27 mm

A (in)
1 1/16 in

B (mm)
19 mm

B (in)
3/4 in

Maximum line Ø (mm)
6 mm

Maximum line Ø (in)
1/4 in

Fasteners (mm)
4 RH mm

Fasteners (in)
#8 RH in