208039-2 is a fluorosilicone O-ring designed for use with ARINC 600 type connectors. The O-ring is manufactured from fluorosilicone material conforming to MIL-R-25988, Class 1, Grade 60, with a durometer hardness of 60. Dimensions are specified in inches with tolerances of ±0.02 for 2-place decimals and ±0.005 for 3-place decimals. This O-ring is commonly used in aerospace and aviation connector applications where reliable sealing performance is required.