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Failsafe Backstay Insulators

Hayn Failsafe Backstay Insulators are engineered with a ball-socket internal design and Tufnol insulation to prevent electrical transference through the rig, available in a wide range of end fitting combinations to suit virtually any backstay configuration. 

Strong Where It Matters

Failsafe Backstay Insulators

The failsafe design is the key differentiator here: should the Tufnol socket be compromised for any reason, the retaining nut bottoms out against the stainless housing rather than releasing the fitting, keeping the insulating studs attached to the body so the rig can be re-tensioned until a proper repair is made. Each insulator is assembled from two halves with a permanent thread-locked center coupling, and end fitting options include Swage, Compression, Eye, Toggle, and Fork, making any combination of ends available to order. Swage-end insulators can be ordered un-glued for field swaging with a WireTeknik or equivalent roll swager, and the range covers imperial wire sizes from 3/16" through 5/8" and metric sizes from 5mm through 16mm 

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Insulator End Fitting Configurations

Failsafe Backstay Insulators

The design of the insulators allows for numerous end fitting combinations. End fitting options include Swage, Compression, Eye, Toggle, and Fork.

Insulators are assembled from two halves utilizing a center coupling. Any combination of halves detailed below is available. Permanent thread locker is used at the center joint to finalize the assembly process.

Imperial Wire Sizes
W - Wire Ø D - Pin/Hole Ø H - Compression End H - Swage End H - Eye End H - Toggle End H - Fork End
3/16″ 7/16″ 4″ 3 15/16″ 4 1/8″ 5 11/32″ 4 3/4″
7/32″ 7/16″ 4″ 3 15/16″ 4 1/8″ 5 7/8″ 4 3/4″
1/4″ 1/2″ 4 1/4″ 4″ 4 1/2″ 6 3/16″ 4 3/4″
9/32″ 1/2″ 4 15/16″ 4 1/2″ 5″ 6 11/16″ 5 1/2″
5/16″ 5/8″ 5 1/4″ 5 3/8″ 6″ 8 1/4″ 6 7/8″
3/8″ 5/8″ 6 1/8″ 5 3/8″ 6″ 8 1/4″ 6 7/8″
1/2″ 3/4″ 7 9/16″ 6 3/8″ 7″ 9 11/16″ 8″
9/16″ 7/8″ 8 3/4″ 7 11/16″ 8 7/8″ 12 7/8″ 9 3/8″
5/8″ 1″ 10 1/8″ 9 5/16″ 9 3/8″ 13 1/4″ 10 3/4″
Metric Wire Sizes
W - Wire Ø D - Pin/Hole Ø H - Compression End H - Swage End H - Eye End H - Toggle End H - Fork End
5mm 7/16″ 4″ 3 15/16″ 4 1/8″ 5 11/32″ 4 3/4″
6mm 1/2″ 4 1/4″ 4″ 4 1/2″ 6 3/16″ 4 3/4″
7mm 1/2″ 4 15/16″ 4 1/2″ 5″ 6 11/16″ 5 1/2″
8mm 5/8″ 5 5/16″ 5 3/8″ 6″ 8 1/4″ 6 7/8″
10mm 5/8″ 5 7/8″ 5 3/8″ 6″ 8 1/4″ 6 7/8″
12mm 3/4″ 7 9/16″ 6 3/8″ 7″ 9 11/16″ 8″
14mm 7/8″ 8 3/4″ 7 11/16″ 8 7/8″ 12 7/8″ 9 3/8″
16mm 1″ 10 1/8″ 9 5/16″ 9 3/8″ 13 1/4″ 10 3/4″
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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 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.