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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Swage Shroud Terminals

Hayn Swage Stemball Terminals are Type 316 stainless steel ball-head wire terminals that seat into a compatible cup fitting to allow angular articulation at the wire end, reducing the bending stress concentration that drives fatigue failure at fixed terminal interfaces. 

Strong Where It Matters

Swage Shroud Terminals

The stemball's spherical head distributes load across the cup seat rather than locking the wire end into a fixed geometry, which is the key fatigue-life advantage over a standard eye or fork terminal in applications where the lead angle shifts under load. The range is one of the most extensive available, covering imperial wire sizes from 1/8" through 9/16" and metric sizes from 3mm through 14mm, with multiple head diameter variants on many wire sizes to match the specific cup geometry of the receiving fitting. Compact Strand and Dyform (-CS) versions are stocked across the metric range, and custom configurations are available on request for stemball geometries not covered by the standard lineup. 
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swage stemball terminal

Imperial Wire Sizes

Part # W-Wire Dia. Cup Washer # HD-Head Dia. RAD-Radius Weight lbs.
SB18 1/8″ SBC18 0.50″ 0.25″ 0.02
SB532 5/32″ SBC532 0.68″ 0.34″ 0.05
SB532X0.64 5/32″ SBC532 0.64″ 0.34″ 0.05
SB316 3/16″ SBC316 0.68″ 0.34″ 0.07
SB316X0.74 3/16″ SBC316 0.74″ 0.34″ 0.08
SB732 7/32″ SBC732 0.78″ 0.40″ 0.11
SB14 1/4″ SBC14 0.80″ 0.41″ 0.17
SB14X1.09 1/4″ – 1.09″ 0.55″ 0.22
SB932 9/32″ SBC932 0.87″ 0.42″ 0.26
SB932X0.98 9/32″ – 0.98″ 0.49″ 0.28
SB932X1.090 9/32″ – 1.09″ 0.55″ 0.31
SB516 5/16″ – 1.07″ 0.54″ 0.36
SB516X0.98 5/16″ SBC516 0.98″ 0.49″ 0.34
SB38 3/8″ – 1.24″ 0.62″ 0.54
SB38X1.09 3/8″ SBC38 1.09″ 0.54″ 0.48
SB716 7/16″ – 1.24″ 0.62″ 0.70
SB716X1.07 7/16″ SBC38 1.07″ 0.53″ 0.67
SB12 1/2″ – 1.39″ 0.70″ 0.78
SB12X1.25 1/2″ – 1.25″ 0.63″ 0.88
SB916 9/16″ – 1.70″ 0.86″ 1.44

Note: -CS is for use with Compact Strand / Dyform wire.

Metric Wire Sizes

Part # W-Wire Dia. Cup Washer # HD-Head Dia. RAD-Radius Weight lbs.
SBM03 3mm SBC18 12.6mm 6.3mm 0.02
SBM04 4mm SBC532 17.5mm 8.8mm 0.05
SBM04X15 4mm SBC532 16.2mm 8.8mm 0.07
SBM05 5mm SBC316 17.5mm 8.7mm 0.07
SBM05X15 5mm – 15mm 7.5mm 0.07
SBM05X21 5mm – 21mm 10.3mm 0.10
SBM06 6mm SBC14 20.6mm 10.3mm 0.17
SBM06-CS 6mm SBC14 20.6mm 10.3mm 0.19
SBM06X21-CS 6mm – 21mm 10.3mm 0.22
SBM07 7mm SBC932 21.5mm 11.0mm 0.26
SBM07-CS 7mm SBC932 21.5mm 11.0mm 0.30
SBM07X25 7mm – 25.0mm 12.4mm 0.28
SBM07X25-CS 7mm – 25mm 12.4mm 0.34
SBM08 8mm – 27.5mm 13.8mm 0.36
SBM08-CS 8mm – 27.5mm 13.8mm 0.42
SBM08X25 8mm SBC516 25.0mm 12.4mm 0.34
SBM08X25-CS 8mm SBC516 25.0mm 12.4mm 0.40
SBM10 10mm – 31.5mm 15.8mm 0.54
SBM10-CS 10mm – 31.5mm 15.8mm 0.60
SBM10X27.5 10mm SBC38 27.5mm 13.8mm 0.50
SBM11 11mm – 31.5mm 15.7mm 0.70
SBM11X27 11mm SBC38 27.0mm 13.4mm 0.67
SBM12 12mm – 35.0mm 17.5mm 0.87
SBM12-CS 12mm – 35.0mm 17.5mm 1.00
SBM12X32 12mm – 32.0mm 16.0mm 0.79
SBM14 14mm – 43.0mm 21.8mm 1.44
SBM14-CS 14mm – 43.0mm 21.8mm 1.61

Note: Due to the numerous variations in stemball configurations on the market, custom configurations are available to your 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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