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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
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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 K550/C651 Turnbuckle Combination integrates the K550 Micro Stemball Tang with the C651 Tip Turnbuckle Assembly to deliver micro-adjustment capability, greater articulation at the chainplate, and improved resistance to wear in a single pre-matched assembly. 

NAVTEC by Hayn - Strong Where It Matters

NAVTEC K550 / C651 Turnbuckle Combination

Ordering the K550 and C651 as a matched combination ensures the tang, turnbuckle, cup washer, cap, and stainless backing plate are correctly sized for the specific rod size from the outset, eliminating the specification errors that can occur when these components are sourced separately. The integrated ball-socket interface between the tang and turnbuckle provides the micro-adjustment range and articulation that rod rigging demands at the deck fitting, while the cup washer reduces wear at the contact surface over time. Available in 12 configurations covering NAVTEC rod sizes from -04 through -60, with a Suffix 02 tang variant available on request. 
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K550-C651-turnbuckle-combination

NAVTEC K550 / C651 Turnbuckle Combination

Hayn Part # NAVTEC Part # W-Rod Size C651-Part # Cup Washer-Part #
HYN-K550-004S08 K550-008S08 -04 C651-004-08B K551-02-008S08
HYN-K550-006S08 K550-008S10 -06 C651-006-10B K151-02-0082
HYN-K550-008S10 K550-008S10 -08 C651-008-10B K151-02-0082
HYN-K550-010S12 K550-012S12 -10 C651-010-12B K151-02-0121
HYN-K550-012S14 K550-012S14 -12 C651-012-14B K151-02-012S14
HYN-K550-017S16 K550-022S16 -15 C651-015-16B K151-02-022S16
HYN-K550-017S16 K550-022S16 -17 C651-017-16B K151-02-022S16
HYN-K550-030S20 K550-030S20 -22 C651-022-20B K151-02-030S20
HYN-K550-030S20 K550-030S20 -30 C651-030-20B K151-02-030S20
HYN-K550-048S24 K550-048S24 -40 C651-0402428B K401-02-482
HYN-K550-048S24 K550-048S24 -48 C651-0482428B K401-02-482
HYN-K550-060S28 K550-060S28 -60 C651-0602832B K151-02-060S28

Assembly includes 1 cap, 1 cup washer, and 1 stainless backing plate. Suffix 02 from K550 Tang available upon request.

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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