Rack Mount Universal Server Rails with Adjustable Mounting Depth

HOSTKEY 1U to 4U universal server rack rails with adjustable mounting depth allow you to mount servers and network equipment that were not supplied with original rails into a standard 19-inch 4-post rack. The adjustable depth and high load capacity reduce installation time and help protect equipment during maintenance. Included mounting hardware and a quick installation guide make it easy to install both OEM and non-OEM servers.

This is a universal solution for standard 19-inch racks, compatible with most servers, including HPE ProLiant, Dell PowerEdge, Supermicro, Lenovo ThinkSystem, Gigabyte and ASUS servers, as well as switches and routers from Cisco, Juniper, Arista and other vendors.

Tested Daily in HOSTKEY Infrastructure

HOSTKEY is a large hosting provider operating thousands of servers, and we use these server rack rails every day to scale our own infrastructure. The product has been validated by our engineers under real conditions in routine installation tasks, ensuring consistent quality, reliability and providing all the listed performance benefits in production environments.

Key Benefits

Universal 1U–4U compatibility.
Works across brands and generations. No OEM lock-in.
Maximum rack density.
Zero-gap design lets you fully populate a 42U rack with no wasted space.
Fits standard racks & adjustable depth.
Compatible with 19-inch 4-post racks, adjustable depth from 650 to 900 mm.
Built for heavy use.
Galvanized steel, corrosion-resistant, rated for up to 40 kg.
Lower long-term costs.
One rail set for multiple server refresh cycles.
Fast availability at scale.
Produced and stocked in Amsterdam, with delivery from 1 day.

We offer a Free Sample for verified businesses.
If you are a data center operator, hosting provider, IT installation company or refurbished hardware dealer, contact us today to request a free test unit for your next project.

VAT and Shipping not included in the listed prices

🔶 Single Rail Set – €40 per set
🔶 Bulk Pack (10 sets) – €30 per set (–25%)

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Specifications

Feature	Details
Material	Heavy-duty Galvanized Steel (Scratch & Corrosion Resistant)
Mounting Type	Rack Mount
Size	Universal 1U to 4U Compatibility
Adjustable Depth	650mm to 900mm (27" to 37")
Standard	EIA-310-D, REACH, RoHS, and CE standards; fits standard 19-inch racks. The ultra-slim profile is optimized for zero-clearance installation. You can perfectly stack 42 servers in a 42U rack
Compatibility	Servers and routers. 4-Post Racks (Square, Round, or Threaded holes)
Weight Capacity	Supports up to 40 kg (90 lbs)
Set Weight	1.1 kg (Lightweight for lower shipping/floor load)
Included Hardware	Left and right side universal server rail set. Optional 8x M6 Cage Nuts and Screws.
Made in	the Netherlands

Pricing

Single Rail Set – €40 per set
Bulk Pack (10 sets) – €30 per set (–25%)

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VAT and Shipping not included in the listed price

Delivery

Small batches: Dispatched the next business day from Amsterdam.
Enterprise scale: We can deliver several thousand sets with a short lead time of just 3–4 weeks upon order.

Key Benefits of Rack Mount Universal Server Rails

OEM-independent by design

One rail set works across multiple server brands and generations, removing dependency on proprietary mounting kits.

True High-Density "No-Gap" Stacking

Our ultra-slim profile is optimized for zero-clearance installation. You can perfectly stack 42 servers in a 42U rack without losing vertical space to bulky mounting hardware or non-standard flanges.

Saves time during upgrades and redeployments

No need to source, order, or wait for brand-specific rails when swapping or adding hardware.

Ideal for refurbished and mixed hardware fleets

Simplifies standardization when racks contain servers from different vendors and production years.

Built for frequent hardware changes

Designed to withstand repeated installations without loss of alignment or stability.

Easy assembly and installation

The straightforward mounting process reduces installation time and minimizes operational effort.

Predictable infrastructure costs

Eliminates recurring spending on replacement rails and reduces operational overhead.

Dutch Quality & Engineering

Engineered and manufactured in the Netherlands, our rails feature high-precision tolerances and are made from heavy-duty galvanized steel. They are built for extreme durability, resisting scratches and corrosion even after years of repeated hardware swaps.

Professional Partner Samples

We provide free samples to verified business partners. If you are a data center operator, hosting provider, IT installation company or refurbished hardware reseller, contact us to request a test unit for your upcoming project.

FAQ

How to install server rack rails?

Server rack side rails are installed by attaching them to the front and rear posts of a standard 19-inch rack, then placing the server onto the mounted rails. Our Universal Server Rails do not require proprietary tools and are adjustable to fit rack depths from 650 to 900 mm. For installation, you can order 8x M6 cage nuts and screws; the screws have a diamond-shaped head for easier alignment and a more sturdy, secure assembly.

Are server rack rails universal?

Most server rack sliding rails are vendor-specific, but HOSTKEY is different. Our universal sliding server rack rails are designed to be truly universal. They support 1U to 4U equipment across multiple vendors and feature an adjustable depth from 650 mm to 900 mm (27" to 37"), which allows the same server rack rails to fit different rack models and layouts. This reduces compatibility issues, simplifies deployment and saves both time and money when racks or hardware are changed.

What is the difference between sliding and fixed server rack rails?

Sliding server rack rails allow the server to be pulled out of the rack for maintenance, while fixed server rack rails keep the server in a static position. Our Server Rails are fixed server rack rails, designed for maximum rack density, higher structural stability and a lower cost, making them a practical choice for environments where servers are rarely serviced in-rack.

Do I need server rack rails to rack mount a server?

Yes, in most cases server rack shelf rails are required to safely rack mount a server and distribute its weight correctly. Without server rack rails, airflow, stability, and serviceability are usually compromised.

What server rack rails do I need for a 1U / 2U server?

For a 1U or 2U server, you need rack rails rated for the correct height and weight. We offer server rack rails that support 1U, 2U, 3U, and 4U servers, with a load capacity of up to 40 kg, covering most standard configurations.

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Can I mount a server without server rack rails?

A server can be mounted without server rack rails using shelves, but this is generally a workaround rather than a best practice. Using proper server rack rails provides better weight distribution, airflow and long-term reliability.

Are server rack rails compatible with square hole racks?

Yes, HOSTKEY rack universal server rails are compatible with standard 19-inch 4-post racks, including square hole racks, as well as round and threaded hole racks.

What are rack mount server rails and who are they for?

Rack mount server rails are used to securely install servers and network equipment into a 19-inch rack. Rack Mount Universal Server Rails are designed for data centers, hosting providers and system integrators who need reliable rackmount server rails for daily infrastructure scaling.

Are rack rails server solutions universal or vendor-specific?

Most rack rails server solutions are vendor-specific, but this product is a universal server rails kit. It supports equipment from multiple vendors and is not tied to OEM designs, making it ideal for mixed environments.

Do these server rack slide rails support sliding functionality?

This product is not server rack slide rails or sliding rails for a server rack, Rather they are fixed server rack rails, designed for maximum rack density, stability and cost efficiency in large-scale deployments.

What server sizes are supported?

The rails support 1U server rails, 2U server rails and 4U server rails configurations. They also work as 1U server rack rails for most standard 19-inch racks.

Can these rails be used as server shelf rails?

Yes, in practice they can replace server shelf rails and adjustable rack mount server shelf rails when fixed mounting is needed. This is common in hosting environments where servers are rarely serviced in-rack.

Are these short server rack rails or deep server rack rails?

Both. The adjustable depth allows use as short server rack rails and deep server rack rails, with support for rack depths from 650 mm to 900 mm.

Is this a complete server rails kit?

Yes, this is a complete server rails kit, with optional M6 cage nuts and screws available for installation in square hole racks.

Who typically buys these server rails?

These server rack rails are commonly purchased by hosting providers, system integrators and server rails suppliers who deploy hardware at scale and need predictable, repeatable installations.

Are these cheap server rails?

These are cost-effective cheap server rails compared to OEM alternatives, while still offering professional-grade durability and load capacity of up to 40 kg.