Main Deck - Sailboat Hardware & Rigging - Rig Adjustment & Tuning - Turnbuckles - Calibrated - Ronstan Sealoc Closed-Body Calibrated Turnbuckles - Stainless Steel

Ronstan Sealoc Closed-Body Calibrated Turnbuckles - Stainless Steel

Ronstan Sealoc Closed-Body Calibrated Turnbuckles - Stainless Steel
RONSTAN

Sealoc Premium Closed-Body Calibrated Turnbuckles

Toggle & Swage, Imperial Wire Sizes

Grade 316 Stainless Steel Bodies & Terminals
Chrome-Plated Aluminum Silicon Bronze Coupling Nuts

These Type 1 turnbuckles have a sleek, modern profile with no sharp edges. They are easily adjusted by turning the unique coupling nut, which is free to rotate on the turnbuckle barrel. They are secured with a quick turn on the cone-shaped locking nut.

With single-end adjustment and a fine thread, Type 1 turnbuckles are much easier to adjust than conventional turnbuckles. The use of dissimilar but compatible metals for the threaded components avoids the risk of thread seizure. Toggles are designed with full universal movement for easy installation and connection. They allow the assembled cable to move where the structure is subject to wind loads or vibration.

  • Laser-etched calibration marks allow accurate, repeatable settings for precise adjustment and tuning of rig tension
  • Tapered lock nut locks the threaded terminal in position without split pins - nothing to catch on sails, and no tape required
  • Coupling nut remains free to rotate on the body with no effect on rig tension, reducing wire fatigue
  • Coupling nut is manufactured in AISi Bronze, to prevent thread seizure (galling) with stainless body and threaded swage terminal
  • Fine, rolled threads
  • Multi-axial toggles


Applications
  • Precise adjustment for imperial wire-rigged boats from dinghies to small keelboats


Mfg No.Wire
Diameter
Thread
Type
ABC MinC MaxDEWeight
RF1574-04041/8"
1/4" UNF*5/16"
(8.3mm)
5/16"
(8.0mm)
7-19/32"
(180mm)
9-1/4"
(235mm)
19/32"
(15mm)
1/4"
(6.4mm)
3.9 oz.
(110g)
RF1575M04054mm
(5/32")
5/16" UNF*3/8"
(9.4mm)
7/16"
(11.0mm)
8-1/8"
(206mm)
10-11/16"
(271mm)
25/32"
(20mm)
5/16"
(7.9mm)
6.7 oz.
(190g)
RF1574-06053/16"5/16" UNF*3/8"
(9.4mm)
7/16"
(11.0mm)
8-5/8"
(219mm)
11-3/16"
(284mm)
25/32"
(20mm)
5/16"
(7.9mm)
6.9 oz.
(196g)
RF1574-06063/16"3/8" UNF*13/32"
(10.5mm)
7/16"
(11.0mm)
9-13/32"
(239mm)
12-9/16"
(319mm)
7/8"
(22mm)
3/8"
(9.5mm)
10.6 oz.
(301g)


* Unified National Fine

Breaking Loads
RF1574-0404 - 3,590 Lbs (1,630kg)
RF1575M0405 - 4,960 Lbs (2,250kg)
RF1574-0605 - 4,960 Lbs (2,250kg)
RF1574-0606 - 7,390 Lbs (3,350kg)
SKU Model   QTY
00501815 Mfg# RF1574-0404 MAP Price: $76.46
00501820 Mfg# RF1575M0405 MAP Price: $84.96
00501825 Mfg# RF1574-0605 MAP Price: $92.65
00501830 Mfg# RF1574-0606 MAP Price: $105.36