Backstay tensioners Rigging screw covers

Aluminium rigging screw covers with PVC top-plug The round rigging screw covers are kind to your sails, sheets and clothing. Nothing can get snagged or chafed
on the rigging screws. The rigging screws can be kept
well greased, without having to worry about staining the
sails or sheets.
Art. No. For Tube Tube Spare rigging screw dia., mm length top plug outer/inner mm Art. No. 319-580-01 7/16" (6 mm) 38/35 650 319-580 x 2319-581-01 1/2" (7 mm) 43/40 650 319-581 x 2
319-582-01 5/8" (8 mm) 50/46 700 319-582 x 2
319-583-01 3/4" (10 mm) 57/53 800 319-583 x 2
319-584-01 7/8" (12 mm) 67/63 1100 319-584 x 2
319-585-01 M24 (14 mm) 75/71 1400 319-585 x 2 Works as a halyard tensioner too The backstay tensioner can also be used as genoa and main halyard tensioner, suitable for yachts up to 70-80
feet. It is permanently fitted to the mast, and connects
directly to the wire halyard. The halyard?s detachable
rope tail simplifies stowage. Seldén backstay tensioners have smooth, clean surfaces. Even the wire boat terminal is fully covered. These low-weight
backstay tensioners are simple to use. All you do is insert
a standard winch handle and turn. The tensioner has a
maximum working load of 30 kN. The stroke is an ample
250 or 400 mm, depending on the length of the tensioner.
Clevis pins and bushes are supplied with every adjuster
to marine suit small chainplates for Ø 6 and Ø 7 mm wire. When
using the backstay adjuster with a Ø 10 mm backstay, the
following limitations apply: ? forestay and backstay are both Ø 10 mm, 1 x 19 wire or other stay material with an ultimate strength of
88 kN (8800 kg/19499 lbs) or less? the backstay-to-mast angle must be at least 40% greater than the forestay-to-mast angle. When the backstay has been fully tightened, mark the
stay with a piece of tape (see Fig. 1) at the top of the
backstay tensioner. The tape marker will enable you to avoid overtensioning. Intermediate values can be marked with different colours.
Fig. 1

Hints

The length of the split pin should be 1.5 x the diameter of the clevis pin or the threaded terminal. The ends of the
pin should be spread approx. 20° apart when the pin is
locked (see Fig. 2). To protect the ends, fold a length of
tape into a cushion, place the cushion over the ends and wrap the remaining tape a couple of times around the rigging screw (see Fig. 3). Adjust the rigging screw using two ordinary or adjus-table spanners (see picture). Never insert a screwdriver through the body of the rigging screw, as this can seri-ously damage the screw.
Halyard tensioners. Backstay tensioners
for Ø 6-8 mm wire Art. No. Stroke Min/max Breaking Safe working mm length, mm load, kN load, kN Fig. 3Fig. 2 174-601-01 250 518/768 65 30 174-601-02 400 818/1218 65 30 Halyard tensioners
Art. No. Stroke Min/max Breaking Safe working mm length, mm load, kN load, kN Read more about rigging and
tuning in Seldén?s publication
?Hints and advice?.
174-601-03 400 818/1218 65 30 158159