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Swage Forks

Hayn Swage Forks are Type 316 stainless steel clevis fork wire terminals available across one of the broadest size ranges in the catalog, covering imperial wire diameters from 1/8" through 1" and metric wire diameters from 3mm through 26mm with multiple pin diameter options on several wire sizes. 

Strong Where It Matters

Swage Forks

The swage fork creates a permanent, high-strength clevis connection at the wire end that integrates directly with toggles, turnbuckles, chainplate fittings, and other pin-connected hardware throughout the rigging system. Multiple pin diameter options on certain wire sizes — standard, DS (down-size), and US (up-size) configurations — allow riggers to match the fork to the specific pin diameter of the receiving fitting without being locked into a single pin size per wire diameter. Full swage specifications are available on the Hayn website, and hardware factor dimensions are published for all imperial and metric configurations to simplify total assembly length calculations. 

swage forks

Imperial Wire Sizes

Part # W-Wire Dia. D-Pin Dia. A-Jaw Depth E-Jaw Gap F-Fork Dia. H-Hardware Factor Weight lbs.
SF04 1/8″ 1/4″ 3/8″ 1/4″ 9/16″ 1″ 0.05
SF05 5/32″ 5/16″ 7/16″ 5/16″ 11/16″ 1-1/8″ 0.09
SF06 3/16″ 3/8″ 9/16″ 3/8″ 7/8″ 1-3/8″ 0.18
SF08 1/4″ 7/16″ 11/16″ 7/16″ 1″ 1-3/4″ 0.31
SF08US 1/4″ 1/2″ 3/4″ 1/2″ 1-1/8″ 1-13/16″ 0.44
SF09 9/32″ 1/2″ 23/32″ 1/2″ 1-1/8″ 1-11/16″ 0.53
SF10DS 5/16″ 1/2″ 11/16″ 1/2″ 1-1/8″ 1-13/16″ 0.75
SF10 5/16″ 9/16″ 15/16″ 9/16″ 1-3/8″ 2-1/16″ 0.90
SF10US 5/16″ 5/8″ 15/16″ 5/8″ 1-1/2″ 2-5/16″ 1.09
SF12 3/8″ 5/8″ 15/16″ 5/8″ 1-1/2″ 2-5/8″ 1.98
SF16 1/2″ 3/4″ 1″ 3/4″ 1-7/8″ 3″ 2.71
SF18 9/16″ 7/8″ 1-5/16″ 7/8″ 2-1/8″ 3-1/8″ 3.60
SF20 5/8″ 1″ 1-15/32″ 1″ 2-1/2″ 3-3/8″ 5.35
SF24 3/4″ 1-1/8″ 1-3/4″ 1-1/8″ 2-3/4″ 5-1/8″ 7.84
SF28 7/8″ 1-1/4″ 1-15/16″ 1-1/4″ 3″ 4-5/8″ 9.62
SF32 1″ 1-3/8″ 2-1/8″ 1-3/8″ 3-1/4″ 5-5/8″ 12.20

Metric Wire Sizes

Part # W-Wire Dia. D-Pin Dia. A-Jaw Depth E-Jaw Gap F-Fork Dia. H-Hardware Factor Weight lbs.
SFM03 3mm 1/4″ 3/8″ 1/4″ 9/16″ 1″ 0.05
SFM04 4mm 5/16″ 7/16″ 5/16″ 11/16″ 1-1/8″ 0.09
SFM05 5mm 3/8″ 9/16″ 3/8″ 7/8″ 1-3/8″ 0.18
SFM06 6mm 7/16″ 11/16″ 7/16″ 1″ 1-3/4″ 0.31
SFM07 7mm 1/2″ 23/32″ 1/2″ 1-1/8″ 1-11/16″ 0.44
SFM08DS 8mm 1/2″ 11/16″ 1/2″ 1-1/8″ 1-13/16″ 0.53
SFM08 8mm 9/16″ 15/16″ 9/16″ 1-3/8″ 2-1/16″ 0.75
SFM08US 8mm 5/8″ 15/16″ 5/8″ 1-1/2″ 2-5/16″ 1.08
SFM10 10mm 5/8″ 15/16″ 5/8″ 1-1/2″ 2-5/8″ 2.04
SFM12 12mm 3/4″ 1″ 3/4″ 1-7/8″ 3″ 2.71
SFM14 14mm 7/8″ 1-5/16″ 7/8″ 2-1/8″ 3-1/8″ 4.36
SFM16 16mm 1″ 1-15/32″ 1″ 2-1/2″ 3-3/8″ 5.35
SFM19 19mm 1-1/8″ 1-3/4″ 1-1/8″ 2-3/4″ 5-1/8″ 7.84
SFM22 22mm 1-1/4″ 1-15/16″ 1-1/4″ 3″ 4-5/8″ 9.62
SFM26 26mm 1-3/8″ 2-1/8″ 1-3/8″ 3-1/4″ 5-5/8″ 12.20
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.