Ronstan Calibrated Turnbuckle Body & Lock Nut, 5/16" Thread
Shipping and Delivery
Enjoy free shipping on qualifying orders of $145 or more delivered within the 48 contiguous United States. Alaska, Hawaii, Puerto Rico, and other U.S. territories are excluded.
Delivery for qualifying free-shipping orders takes 8 to 10 business days.
Free shipping does not apply to:
- Orders containing only clearance items
- Customized special orders made to your detailed requirements
- Sails and boats
- Long tracks, spinnaker poles, whisker poles, and large tubes
- Oversized or heavy items, including items that require less-than-truckload (LTL) freight shipping
Standard Shipping
- UPS and FedEx Ground: Delivery usually takes 2 to 5 business days for in-stock orders.
- USPS: Allow an additional 3 business days beyond the standard shipping time.
- Saturday delivery: UPS and FedEx deliver on Saturdays only for overnight shipments sent on Friday. Additional charges may apply.
Oversized Items and Freight Shipping
Oversized items, such as whisker poles, spinnaker poles, and tracks longer than 8 feet, require freight shipping. The estimated shipping cost is $500, depending on the destination.
For freight deliveries, provide a commercial address, such as the marina, yacht club, or boatyard where your sailboat is located. The recipient must sign for the shipment upon delivery.
International Orders
International customers are responsible for all applicable import duties, fees, and taxes.
Ronstan Calibrated Turnbuckle Body & Lock Nut, 5/16" Thread
Elegant Design, Exceptional Performance. From their clean lines to the use of the highest grade materials and quality finish, Ronstan Type 10 turnbuckles are engineered to deliver performance while enhancing the appearance of any yacht, or tensile project. Calibrated models. For accurate, repeatable settings of rig tension and precise adjustment, calibrated turnbuckle models are available for wire sizes up to 6mm (1/4"); thread sizes 1/4", 5/16", 3/8" UNF Type 10. Type 10 closed body turnbuckles have a sleek, modern profile with no sharp edges. They are easily adjusted by turning the unique adjustment nut, which is free to rotate within the sleeve on the turnbuckle body, and are secured with a quick turn on the locking nut. A sight hole is provided in the body to verify adequate thread engagement. With fine thread and single end adjustment, Type 10 turnbuckles are much easier to adjust than conventional turnbuckles, and the use of dissimilar but compatible metals for the threaded components avoids the risk of thread seizure. Toggles are designed with full lateral articulation for easy installation and connection compatibility. Matching Ronstan rigging fittings have rolled external threads for maximum strength and reliability - unlike cut threads, the stainless steel bar is formed up and down to create a thread with the grain remaining unbroken and flowing the full length of the thread. Threads are UNF (Unified National Fine), short pitch threads for fine adjustment and reduced adjustment effort Roll swage integrity. Matching swage fittings suit industry-standard roll swaging presses and dimensions are derived from the original 'Milspec' for maximum integrity. They are suitable for use with modern and traditional wire constructions, including 1x19, 7x19 and compact strand Wire termination options. A full range of eye, fork and toggle fittings complement the turnbuckles to permit assembly of finished rigging elements to suit virtually any application
Features:
- Laser etched calibrations allow accurate, repeatable setting of rig tension.
- Sleek modern profile.
- Easier to adjust than conventional turnbuckles due to fine thread and single end adjustment.
- Threads are UNF (Unified National Fine), short pitch threads for fine adjustment and reduced adjustment effort.
- Easily adjusted - by turning the unique adjustment nut.
- Lock nut included to secure desired length.
- Use of dissimilar but compatible metals avoids the risk of thread seizure.
- Toggle end provides full lateral articulation and connection compatability.
- Threaded eye, toggle and swage terminal end options available.
- Handle kit and swage grip available for 5/16" threaded models
Ronstan Calibrated Turnbuckle Body & Lock Nut, 5/16" Thread
Elegant Design, Exceptional Performance. From their clean lines to the use of the highest grade materials and quality finish, Ronstan Type 10 turnbuckles are engineered to deliver performance while enhancing the appearance of any yacht, or tensile project. Calibrated models. For accurate, repeatable settings of rig tension and precise adjustment, calibrated turnbuckle models are available for wire sizes up to 6mm (1/4"); thread sizes 1/4", 5/16", 3/8" UNF Type 10. Type 10 closed body turnbuckles have a sleek, modern profile with no sharp edges. They are easily adjusted by turning the unique adjustment nut, which is free to rotate within the sleeve on the turnbuckle body, and are secured with a quick turn on the locking nut. A sight hole is provided in the body to verify adequate thread engagement. With fine thread and single end adjustment, Type 10 turnbuckles are much easier to adjust than conventional turnbuckles, and the use of dissimilar but compatible metals for the threaded components avoids the risk of thread seizure. Toggles are designed with full lateral articulation for easy installation and connection compatibility. Matching Ronstan rigging fittings have rolled external threads for maximum strength and reliability - unlike cut threads, the stainless steel bar is formed up and down to create a thread with the grain remaining unbroken and flowing the full length of the thread. Threads are UNF (Unified National Fine), short pitch threads for fine adjustment and reduced adjustment effort Roll swage integrity. Matching swage fittings suit industry-standard roll swaging presses and dimensions are derived from the original 'Milspec' for maximum integrity. They are suitable for use with modern and traditional wire constructions, including 1x19, 7x19 and compact strand Wire termination options. A full range of eye, fork and toggle fittings complement the turnbuckles to permit assembly of finished rigging elements to suit virtually any application
Features:
- Laser etched calibrations allow accurate, repeatable setting of rig tension.
- Sleek modern profile.
- Easier to adjust than conventional turnbuckles due to fine thread and single end adjustment.
- Threads are UNF (Unified National Fine), short pitch threads for fine adjustment and reduced adjustment effort.
- Easily adjusted - by turning the unique adjustment nut.
- Lock nut included to secure desired length.
- Use of dissimilar but compatible metals avoids the risk of thread seizure.
- Toggle end provides full lateral articulation and connection compatability.
- Threaded eye, toggle and swage terminal end options available.
- Handle kit and swage grip available for 5/16" threaded models

