Black Metal Fence Post with Post Cap. . 16-Gauge Galvanized Steel Line Post. . Black Metal Fence Post with Flange and Post Cap. 4″ x 4″ STEEL POSTS are required for swing gates 10 feet wide or wider, up to 6 feet high. 6″ x 6″ STEEL POSTS are required for swing gates 13 feet wide and . No Dig (Common: 4-in x 4-in x 4-1/2-ft; Actual: 3.9-in x 3.9-in x 4.43-ft) Grand Empire Powder-Coated Steel Decorative Metal Fence Universal Post. 672 products – Advantages of China supply powder coated security 4×4 posts solid metal fence : 1. It prevents the pedestrians and the animals from entering. 41 products – Anping factory 4×4 galvanized square metal fence posts/fence post mounting brackets. US $6.35-13.25 / Piece. 100 Pieces (Min. Order). Find great deals on eBay for 4×4 Steel Tube in Manufacturing Metals and Alloys. Shop with confidence. Jul 3, 2004 – I’m trying to figgure out if a 4×4 (which is really 3.5×3.5) metal square post, 3/16 thick, is strong enough to support a 12′ gate. This is in a . RONA carries Structural Posts and Supports for your Hardware renovation/decorating . Format 4×4″. 0. (0) · Details. Article #80645090. Adjustable Post 5-8 ft.