1/2 NPT X 1/8 IPS Lamp Nipple Adapter Heavy Duty - Etsy
No. 2 Oil Lamp Adapter w/Side Outlet (20102) - Antique Lamp Supply - Quality Lamp Parts Since 1952
RAE Systems ppbRAE 3000+ Portable Handheld VOC Monitor - BLE, CSA, PID 10.6 eV Lamp 1/2" for Total VOC mode only, Rechargeable Li-Ion Battery, Universal Adapter, Monitor only - 059-C11D-000
Hatco DL-725-RTL Heat Lamp, Adj. Cord Mount to Track Adapter, Lower Switch, 725 Shade