The 101-8430-09-201 is an incandescent lamp base from Dialight's Series 101, featuring a T-1 3/4 micgat flange configuration designed for 15/32" mounting applications. The base utilizes a solder terminal type for secure electrical connections and incorporates a black nickel metal finish with brass hardware for enhanced durability and corrosion resistance. The 15/32" mounting hole size accommodates standard fixture installations, making it suitable for indicator lights, panel-mount applications, and industrial signaling systems where reliable incandescent lamp mounting is required. This RoHS-compliant product is engineered for watertight performance in demanding environments.