M38999 series
The 500-008M1R3GHL-186 part of Glenair's M38999 series is a size 8, straight plug, 3-keyed, gold-plated, MIL-DTL-38999 type III, 1-Contact circular connector. The M38999 series is commonly used in avionics and aerospace applications, including those exposed to high vibration, dust, moisture, and range of temperatures. It has become a popular circular connector due to its strength, vibrational resistance, and easy to use cage-clamp termination.