PBC Linear SRM30PD 0400 SL Pre Drilled Linear Shaft Support Rail, Aluminum, 30 mm Shaft Dia, 400 mm Lg 3MMC7 Thread Length 2 1 4 in Thread Length 2 1 4 in Item Fuse Amps 250mA Speed Time Delay Series GMC AC Voltage Rating 250V AC DC Voltage Rating Not Rated Interrupt Rating 10kA at 125V AC Material Aluminum Mounting Hole Center to Center 200 mm Finish Unfinished For Use With Linear Shafting Shaft Material Carbon Steel Product Type Linear Support Rail Shaft Material Grade 1060 Standards ISO System of Measurement Metric Support Rail Material Aluminum Support Rail Drilling Pre Drilled Mounting Surface to Shaft Center 53 mm Mounting Hole Type Threaded Series SRMPD Profile Type Standard Profile Mounting Hole Center to Shaft End 100 mm Surface Hardness Minimum 60 HRC Rail End to Hole 100 mm Country of Origin United States Profile Type Standard Profile