Atlas HO Code 83 to Code 100 Transition Rail Joiners – 12-Pack (144 Joiners) – ATL551

Atlas HO Code 83 to Code 100 Transition Rail Joiners – 12-Pack (144 Joiners) – ATL551 provides a bulk supply of specialized rail joiners designed for connecting HO Code 83 track to HO Code 100 track. This package includes 12 individual Atlas 12-count packages for a total of 144 transition rail joiners, making it an excellent choice for larger layouts, clubs, layout builders and modelers using both Code 83 and Code 100 track.

Because Code 83 and Code 100 rail have different rail heights, connecting the two directly with an ordinary flat rail joiner can leave the tops of the rails misaligned. Atlas transition joiners are designed specifically to help create the necessary transition between these two common HO scale rail sizes.

12 Packs – 144 Total Transition Rail Joiners

ATL551 is supplied as 12 individual packages of Atlas Item #0551. Each individual package contains 12 HO Code 83 to Code 100 transition joiners, providing:

• 12 individual packages
• 12 transition rail joiners per package
• 144 total transition rail joiners

This bulk configuration provides a substantial supply for layouts where multiple Code 83-to-Code 100 track connections are required.

Connect HO Code 83 Track to Code 100 Track

The primary purpose of these transition joiners is to connect Code 83 rail to Code 100 rail. The two rail sizes are commonly found on HO scale model railroads, but their different heights require special consideration when they meet.

Code 100 rail measures approximately .100" high, while Code 83 rail measures approximately .083" high. A transition joiner helps compensate for this difference so the railheads can be properly aligned at the connection.

Why Are Transition Rail Joiners Needed?

Using different rail codes on the same model railroad can be useful when modeling different types of track or expanding an existing layout. However, simply joining Code 83 and Code 100 rail with a standard flat joiner can create a vertical mismatch between the railheads.

A transition rail joiner is designed specifically for this type of connection, helping the two different rail heights meet properly and providing a smoother transition for locomotive and rolling stock wheels.

Where Can Code 83 to Code 100 Transition Joiners Be Used?

Atlas transition joiners are useful in a variety of HO scale track-building situations, including:

• Connecting Code 83 track to Code 100 track
• Expanding older Code 100 layouts with Code 83 track
• Transitioning between different track systems
• Connecting mainline and secondary track using different rail codes
• Layout renovation and rebuilding projects
• Club and modular railroad construction
• Large layouts using multiple rail sizes

Code 83 vs. Code 100 Rail

The "code" of model railroad rail refers to its height in thousandths of an inch. Code 83 rail is approximately .083" high, while Code 100 rail is approximately .100" high.

Both are widely used for HO scale model railroads. Code 100 has traditionally been popular for its durability and long history in sectional and flex track systems, while Code 83 provides a lower-profile rail appearance that more closely represents many prototype railroad applications in HO scale.

Transition joiners allow modelers to incorporate both rail sizes into the same railroad without requiring the entire layout to use a single rail code.

Useful for Expanding Existing Layouts

These joiners are particularly useful when adding Code 83 track to an existing Code 100 railroad. Instead of replacing large amounts of existing track solely to maintain one rail code, transition joiners allow appropriately designed Code 83 and Code 100 track sections to meet.

This can be helpful during layout expansions, track rebuilding projects and gradual upgrades where different areas of the railroad use different rail profiles.

Why Buy the 12-Pack?

With 144 total transition rail joiners, ATL551 provides a large supply for modelers who expect to make numerous Code 83-to-Code 100 connections. The package consists of 12 complete Atlas 12-count packages rather than a single retail package.

This quantity is especially useful for large layouts, model railroad clubs, modular layouts, extensive rebuilding projects and layout builders who regularly work with both Code 83 and Code 100 track.

Atlas HO Code 83 to Code 100 Transition Joiner Features

• HO Scale 1:87
• Designed to transition between Code 83 and Code 100 rail
• Helps compensate for the difference in rail height
• Helps properly align railheads at Code 83-to-Code 100 connections
• 12 individual Atlas packages
• 12 transition joiners per individual package
• 144 total transition rail joiners
• Useful for layout expansions and rebuilding projects
• Ideal for layouts using multiple rail codes
• Useful for club and modular layout construction
• Atlas manufacturer item number 0551
• Fusion Scale Hobbies SKU ATL551

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