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AAR Clamp, Signal & Binding Railroad Nuts

SPIROL specializes in the manufacture of precision machined AAR Nuts for the railroad industry.  SPIROL's Railroad Nuts are held 100% square to the tap.  SPIROL's thread pitch diameter allowances are engineered for ease of assembly after plating, yet manufactured to strict standards with specific gages.  Each production lot has a unique identification number and is traceable through each manufacturing process back to the original raw material test certificate.

SPIROL's Railroad Nuts, otherwise referred to as AAR Clamp Nuts, Binding Nuts, and Gold Test Nuts or AAR Signal Nuts are used in signal lights, crossing bells and terminal blocks.  

SPIROL manufactures the following brass AAR Nuts for the railroad industry:

  • AAR P/N 10706 - #14-24 Binding Crown Nut, Nickel Plated Brass (SPIROL Item #26004)
  • AAR P/N 10707 - #14-24 Clamp Hex Nut, Nickel Plated Brass (SPIROL Item #26003)
  • #14-24 Gold Plated Test Nut, Plated Brass (SPIROL Item #103092)

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Need help choosing the most appropriate fastening solution for your application? SPIROL's expert engineers will review your specific requirements, and design the most cost-effective Railroad Nut to meet your technical and commercial needs. Let us help!

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Local Design, Global Supply.

SPIROL has Application Engineers throughout the world to assist you in your designs, supported by state-of-the-art manufacturing centers and worldwide stocking facilities to simplify the logistics of delivering your product.

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