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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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NAVTEC BY HAYN

The NAVTEC D320 Rod Turnbuckle Center Screw is a chrome-plated bronze center screw for NAVTEC rod turnbuckle assemblies, available in short and long versions to accommodate the full range of NAVTEC rod rigging thread sizes and body geometries. 

NAVTEC by Hayn - Strong Where It Matters

NAVTEC D320 Rod Turnbuckle Center Screw

The center screw is the tension-adjusting component at the heart of the NAVTEC rod turnbuckle, and selecting the correct length version is essential for achieving the required adjustment range within the specific installation geometry. Short versions cover overall lengths from 6" through 15-1/4" and long versions from 9-5/16" through 23-1/4", with both available across thread sizes from 5/16-24 through 1-1/4-12 to match the corresponding NAVTEC rod sizes. Chrome-plated bronze construction provides corrosion resistance while the bronze-on-stainless threaded interface prevents galling during tensioning and seasonal adjustment. 
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NAVTEC D320 Rod Turnbuckle Center Screw

Short Part # NAVTEC # L-Length Weight lbs. Long Part # NAVTEC # L-Length Weight lbs. P-Thread Size T-Thread Length B-Body ⌀
HYN-CS-S516 D320-S10 6.0″ 0.16 – – – – 5/16-24 2 5/8″ 1/2″
HYN-CS-S38 D320-S12 6 3/4″ 0.18 HYN-CS-L38 D320-L12 9 5/16″ 0.30 3/8-24 3″ 1/2″
HYN-CS-S716 D320-S14 7 3/8″ 0.27 HYN-CS-L716 D320-L14 9 7/8″ 0.44 7/16-20 3 1/4″ 5/8″
HYN-CS-S12 D320-S16 8 3/8″ 0.40 HYN-CS-L12 D320-L16 11 7/8″ 0.68 1/2-20 3 5/8″ 5/8″
HYN-CS-S58 D320-S20 9 3/4″ 0.75 HYN-CS-L58 D320-L20 1′-2 1/8″ 1.30 5/8-18 4 1/4″ 7/8″
HYN-CS-S34 D320-S24 11 1/2″ 1.28 HYN-CS-L34 D320-L24 1′-4 1/2″ 1.87 3/4-16 5″ 1″
HYN-CS-S78 D320-S28 1′-1″ 1.92 HYN-CS-L78 D320-L28 1′-5″ 2.87 7/8-14 5 3/4″ 1 1/8″
HYN-CS-S1 D320-S32 1′-2 1/8″ 3.22 HYN-CS-L1 D320-L32 1′-10 1/8″ 5.05 1.0-12 6 1/4″ 1 1/4″
HYN-CS-S118 D320-S36 1′-2 3/4″ 4.10 HYN-CS-L118 D320-L36 1′-10 3/4″ 6.43 1 1/8-12 6 1/2″ 1 1/2″
HYN-CS-S114 D320-S40 1′-3 1/4″ 4.77 HYN-CS-L114 D320-L40 1′-11 1/4″ 8.35 1 1/4-12 6 3/4″ 1 5/8″
Engineered In America Every Hayn fitting is designed and manufactured at our facility in Rocky Hill, Connecticut — the same American workmanship that has set the standard for stainless steel rigging hardware since 1950.
Cold-Worked Production Hayn fittings are cold-worked, not cast. That distinction matters: the cold-working process refines grain structure, increases fatigue resistance, and produces a fundamentally stronger component — one built to perform when the load comes on it.
NAVTEC ENGINEERING STANDARDS NAVTEC components are engineered to perform under the exact conditions that demand the most from your rigging — offshore passages, high-load racing applications, and everything in between. Every fitting is precision-machined to tight tolerances, built from high-grade stainless steel, and designed to integrate seamlessly into rod rigging systems where failure is not an option. 
YOUR EXCLUSIVE SOURCE FOR NAVTEC Hayn is the sole authorized manufacturer and supplier of NAVTEC rigging components. That means every part you order is made to the original specifications, backed by Hayn's manufacturing expertise, and supported by our team in Rocky Hill. There is no other legitimate source for new NAVTEC product — what you get here is the real thing. 
  • Type 316 stainless steel construction for superior saltwater corrosion resistance
  • Manufactured in Rocky Hill, Connecticut to Hayn's proprietary tolerances
  • Precision-machined using advanced CNC manufacturing equipment



  • Engineered for seamless integration in marine and architectural rigging systems

  • Short lead times on both standard and custom components

  • Backed by 75 years of marine and architectural hardware expertise

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Let's Build Something Together

 Hayn has been engineering precision rigging hardware since 1950. So whatever your project demands, you're building with hardware that's been proven at sea and on structure for generations. 
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