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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Structural Tension Rod Systems

Hayn Structural Tension Rod Systems are custom-made-to-order Type 316 stainless steel rod assemblies built around a comprehensive range of fork ends, lock nuts, and double-headed clevis pins covering rod diameters from 1/4" through 1" in both right and left hand thread configurations. 

Strong Where It Matters

Structural Tension Rod Systems

Structural tension rods are specified for architectural bracing, canopy supports, facade systems, and other applications where a high-strength, visually clean tensile element is required between two connection points. Every system is custom made to order — Hayn works from project specifications to produce assemblies with the correct rod diameter, thread hand, fork geometry, and overall length for the specific structural application. The component tables on this page cover the full standard fork, lock nut, and clevis pin range for reference during design and specification; contact Hayn Lines directly to discuss your project requirements before ordering. 
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Fork – 316 Stainless Steel

Part # Rod / Thread Diameter Pin Size Length Jaw Depth Fork Opening
AAF14L 1/4-28 LH 1/4″ 1-13/16″ 19/32″ 1/4″
AAF14R 1/4-28 RH 1/4″ 1-13/16″ 19/32″ 1/4″
AAF516L 5/16-24 LH 5/16″ 2-3/8″ 5/8″ 5/16″
AAF516R 5/16-24 RH 5/16″ 2-3/8″ 5/8″ 5/16″
AAF38L 3/8-24 LH 3/8″ 3.0″ 25/32″ 3/8″
AAF38R 3/8-24 RH 3/8″ 3.0″ 25/32″ 3/8″
AAF12L 1/2-20 LH 1/2″ 4.0″ 1-1/8″ 1/2″
AAF12R 1/2-20 RH 1/2″ 4.0″ 1-1/8″ 1/2″
AAF58L 5/8-18 LH 5/8″ 4-3/4″ 1-1/4″ 5/8″
AAF58R 5/8-18 RH 5/8″ 4-3/4″ 1-1/4″ 5/8″
AAF34L 3/4-16 LH 3/4″ 5-3/8″ 1-1/2″ 3/4″
AAF34R 3/4-16 RH 3/4″ 5-3/8″ 1-1/2″ 3/4″
AAF78L 7/8-14 LH 7/8″ 6.0″ 1-3/4″ 7/8″
AAF78R 7/8-14 RH 7/8″ 6.0″ 1-3/4″ 7/8″
AAF1L 1.0-12 LH 1.0″ 6-7/8″ 2.0″ 1.0″
AAF1R 1.0-12 RH 1.0″ 6-7/8″ 2.0″ 1.0″

Tension rods are custom made to order. Contact Hayn for additional details.

Fork Lock Nut – Traditional Style

Part # Thread Size Outside Dia.
ALN14L 1/4-28 LH 3/8″
ALN14R 1/4-28 RH 3/8″
ALN516L 5/16-24 LH 1/2″
ALN516R 5/16-24 RH 1/2″
ALN38L 3/8-24 LH 9/16″
ALN38R 3/8-24 RH 9/16″
ALN12L 1/2-20 LH 7/8″
ALN12R 1/2-20 RH 7/8″
ALN58L 5/8-18 LH 1-1/8″
ALN58R 5/8-18 RH 1-1/8″
ALN34L 3/4-16 LH 1-1/4″
ALN34R 3/4-16 RH 1-1/4″
ALN78L 7/8-14 LH 1-9/16″
ALN78R 7/8-14 RH 1-9/16″
ALN1L 1.0-12 LH 1-5/8″
ALN1R 1.0-12 RH 1-5/8″

Fork Clevis Pin – Double Headed

Part # Pin Dia. Head Dia. Length
ACP14A 1/4″ 3/8″ 5/8″
ACP516A 5/16″ 7/16″ 3/4″
ACP38A 3/8″ 1/2″ 7/8″
ACP12A 1/2″ 5/8″ 1-1/4″
ACP58A 5/8″ 3/4″ 1-1/2″
ACP34A 3/4″ 7/8″ 2.0″
ACP78A 7/8″ 1.0″ 2-1/4″
ACP1A 1.0″ 1-1/4″ 2-1/2″
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.
Precision Manufacturing Our Rocky Hill production floor runs CNC vertical mills, CNC lathes, large-capacity mill-turn centers, and waterjet cutting systems — all configured to produce hardware that meets exact specifications, every time.
75+ Years of Excellence Hayn has been engineering and manufacturing marine and architectural rigging hardware since 1950. That track record isn't just history, it's the design knowledge, failure data, and continuous improvement that goes into every product we make. 
  • 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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