Standard 'red' Rackstuds
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The original red Rackstuds are the most common and will accommodate around 80% of the racks in the market. They’ll work with vertical rails meeting the following specifications:

Hole Size
EIA-310 Requirement 9.5mm/0.374″
Rackstuds Red 2.2 9.3 – 9.89mm (0.366 – 0.389″)

Rail Thickness
EIA-310 Requirement Not defined
Rackstuds Red 2.2 ≤ 2.2mm/0.086″ (or 14 gauge)

Racks that are known to work best with the 'red' studs
  • B&R Enclosures
  • Dynamix
  • Hallam
  • ModemPak
  • Panduit R4PCN
  • Rittal

Part # RSL20 (20-pack) or RSL100 (100-pack)

New 'blue' Rackstuds
RSL100-2.7_Spill_T_IV_470x270

The new blue Rackstuds are designed to work with thicker vertical rails often encountered in open frames. They’ll work with vertical rails meeting the following specifications:

Hole Size
EIA-310 Requirement 9.5mm/0.374″
Rackstuds Blue 2.7 9.2 – 9.6mm (0.362 – 0.378″)

Rail Thickness
EIA-310 Requirement Not defined
Rackstuds Blue 2.7 2.2 – 2.7mm (0.086 – 0.106″ or 12 gauge)

Max rail thickness must not exceed 2.7mm/0.106″ (including powder coating) otherwise the Rackstuds won’t install properly.
Racks that are known to work with the new 'blue' studs
  • Belden
  • Chatsworth (CPI)
  • Dell PowerEdge 2410, 4220
  • HP Series 10000 G1/G2
  • Liebert
  • Retex
  • Cableways – IPC
  • Cooper B-Line
  • Great Lakes
  • Legrand
  • Rack Technologies IQ frame

Part # RSL100-2.7 (100-pack)

Using the new blue studs in rails <2.2mm/0.086″ is not recommended as the Rackstuds will not be as snug and may cause slight movement in your equipment.
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