Standard lead wires are 18 AWG SEW 1 (SF1) 200C, 12 in. long, stripped 1/2. Mounts using 1/8 in. IPS 27 NPS threaded nipple. Rated at 8A 24V. Nickel plated metal shell conforms to UL requirement for stabilizing bulb against coaxial displacement. Steatite contact base. All shells are grounded independent of contacts.