The US Coupler AR1.315 is a 1-inch aluminum reverse threaded coupler (1.315" OD) for SDR HDPE innerduct conduit. The sharp buttress-type threads withstand high pulling loads meeting or exceeding the Bellcore tensile standard of 1,000 lbs. The wide eight-pitch thread angle reduces installation time significantly. Machined with straight thread and long counterbore lead-in for easy starting. Available in smooth or ribbed exterior wall. Suitable for manhole, direct bury, and aerial applications. Not suitable for air or water tight connections. Made from 6061-T6 aluminum.