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PHONE HOTLINE: 800-346-4296 E-MAIL: sales@hayn.com
Contact Us
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Swage Aircraft Forks – MS Style

Hayn Swage Aircraft Forks (MS Style) are Type 316 stainless steel clevis fork swage terminals conforming to MS20667 military specification, providing a standardized wire termination with an open jaw end for aircraft cable and general rigging applications across wire diameters from 1/16" through 1/2".

Strong Where It Matters

Swage Aircraft Forks – MS Style

The MS style fork geometry is the standard clevis-end termination for aircraft cable where the wire connects to a pin, bolt, or eye fitting, and MS20667 conformance means part numbers cross-reference directly to military and aerospace hardware catalogs for straightforward specification. Available in 12 configurations with hole diameters from 3/16" through 5/8", jaw depths from 7/16" through 1-11/16", and hardware factors from 11/16" through 2-1/16", covering the full range of aircraft cable wire diameters in common use. The MS fork series pairs directly with the Hayn MS20668 Aircraft Eye series for matched terminal assemblies at both wire ends. 
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swage aircraft forks ms style

Swage Aircraft Forks – MS Style

Part # MS Style # W-Wire ⌀ D-Hole ⌀ A-Jaw Depth E-Jaw Gap H-Hardware Factor Weight lbs.
RF2 20667-2 1/16″ 3/16″ 7/16″ 3/32″ 11/16″ 0.01
RF3 20667-3 3/32″ 3/16″ 5/8″ 7/64″ 11/16″ 0.02
RF4 20667-4 1/8″ 3/16″ 11/16″ 13/64″ 7/8″ 0.03
RF5 20667-5 5/32″ 1/4″ 11/16″ 13/64″ 15/16″ 0.06
RF6 20667-6 3/16″ 5/16″ 3/4″ 1/4″ 1 1/16″ 0.09
RF7 20667-7 7/32″ 5/16″ 13/16″ 5/16″ 1 3/16″ 0.14
RF8 20667-8 1/4″ 3/8″ 7/8″ 5/16″ 1 5/16″ 0.2
RF9 20667-9 9/32″ 7/16″ 1″ 21/64″ 1 3/8″ 0.29
RF10 20667-10 5/16″ 7/16″ 1 3/32″ 11/32″ 1 7/16″ 0.4
RF12 20667-12 3/8″ 1/2″ 1 5/16″ 3/8″ 1 13/16″ 0.57
RF14 20667-14 7/16″ 9/16″ 1 9/16″ 3/8″ 1 7/8″ 0.78
RF16 20667-16 1/2″ 5/8″ 1 11/16″ 15/32″ 2 1/16″ 1.02
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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