Library › Hardware › 19-inch rack rail holes (EIA-310: 15.875 / 15.875 / 12.7 mm pitch…

rack-rail-square-hole-gauge-2u

2U rack rail strip, 25 wide × 88.9 long (2 × 44.45) × 2 mm thick, six 9.525 mm square holes (3/8 in) at 6.35, 22.225, 38.1, 50.8, 66.675 and 82.55 mm from one end (pitch 15.875, 15.875, 12.7 mm per U, U boundaries in the middle of the 12.7 mm gaps); width and thickness are Xem's choices; one rail only, no mounting-flange return, no round or tapped hole

Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

part	rail
item	rack unit (U) height
thread	—
dimension / value	44.45 mm (1.75 in)
source / note	Schneider; Rack Solutions; Digital Loggers (1.75 in)

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From the full sheet

19-inch rack rail holes (EIA-310: 15.875 / 15.875 / 12.7 mm pitch, 465.1 mm spacing, 9.5 mm square) and M5 / M6 / 10-32 / 12-24 cage nuts + 2U square-hole rail gauge: every size, notes, mating features and sources. What size is the square hole in a server rack rail, and what size are M5, M6, 10-32 and 12-24 cage nuts?