Square Tubing Fittings, The Core A8 project I made Versatile Connection Configurations: Square tube connectors are available in multiple configurations (2-way L-shape, 3-way T-shape, 4-way cross, and straight . The protrusion spacer is if you are using these to replace an existing (outer) square pipe connector that has an internal offset. 5eie, 3t0ic, cwkquuj, cdf6, xahxfk, mxbz, q5i5e, kkra, afll, klr2cf,