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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Lifeline Termination Studs

Hayn Lifeline Termination Studs are Type 316 stainless steel swage terminal fittings with a flat head end designed to seat flush against a stanchion or deck fitting, providing a clean, low-profile wire termination at fixed lifeline attachment points. 

Strong Where It Matters

Lifeline Termination Studs

Where a standard lifeline stud threads into an adjuster or turnbuckle body, the termination stud is designed for the fixed end of the lifeline run where no tension adjustment is needed and a flush, captive head is the right solution. The flat head seats against the fitting face to transfer load without requiring a threaded connection, keeping the termination point compact and visually clean. Available in machine swage configuration for imperial wire from 1/8" through 1/4" and metric wire from 4mm through 5mm, with Handy Crimp options for 1/8" and 3/16" wire. 
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Lifeline Termination Studs

Imperial Wire Sizes – Machine Swage

Part # W-Wire ⌀ HD-Head ⌀ HT-Thickness H-Hardware Factor Weight lbs.
TSLL18 1/8″ 1/2″ 7/32″ 5/8″ 0.02
TSLL532 5/32″ 9/16″ 7/32″ 5/8″ 0.04
TSLL316 3/16″ 9/16″ 7/32″ 5/8″ 0.05
TSLL14 1/4″ 9/16″ 7/32″ 11/16″ 0.07

Metric Wire Sizes – Machine Swage

Part # W-Wire ⌀ HD-Head ⌀ HT-Thickness H-Hardware Factor Weight lbs.
TSLLM04 4mm 9/16″ 7/32″ 5/8″ 0.04
TSLLM05 5mm 9/16″ 7/32″ 5/8″ 0.05

With Handy Crimp Stud

Part # W-Wire ⌀ HD-Head ⌀ HT-Thickness H-Hardware Factor Weight lbs.
TSCLL18 1/8″ 1/2″ 7/32″ 1/2″ 0.02
TSCLL316 3/16″ 9/16″ 7/32″ 9/16″ 0.04

Note: 1/4″ and 6mm lifeline fittings use 7/32″ / 5.5mm swager dies and specifications.

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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