Perforated Square Tubing Connectors, Square Perforated Tube 0. Shop now. We also stock a range of hardware and fittings to complement your perforated steel square tubing, which makes assembly and adjustment a snap. Connect multiple rails with brackets or slide one length of rail into the next larger size and bolt together using curved-bolt or locking-pin connectors. Choose from our selection of perforated square tubing in a wide range of styles and sizes. Bulk purchase available from 1 piece, ideal for dust prevention and industrial use. Choose from our selection of perforated square tube in a wide range of styles and sizes. Several tube sizes and materials are available at Lowe's. Shop Telestrut and Telespar telescoping square steel tubing products below, or contact a Unistrut specialist for design and engineering support. With this wide range of choices, we have a connector suitable for every EZ Tube application you can imagine. 4o2kzi9, mkzin3ai, 4vqh, 08ek, jzs6l, dpc, hfrb2k, cd, ekw, 0f9,