The Allied 12-90-1021 is a precision-machined hex nipple designed for medical gas manifold and equipment distribution. It features dual 1/8" NPT male threads and a 1" overall length, providing a secure, leak-proof bridge between two female ports. The integrated hex center allows for easy wrench tightening, while the high-quality chrome-plated brass construction ensures maximum durability and clinical hygiene in hospital or laboratory environments.