... high-pressure gas tank, and theloss of Mariner III in 1964, due to mechanical failure. Many projects concerning mechanical relia- Mechanical Engineers' Handbook, 2nd ed., Edited by Myer ... Failure Rates for Selected Mechanical PartsNo. Part Failure Rate per 106 hr1 Hair spring 1.02 Seal, O-ring 0.23 Bearing, roller 0.139-7.314 Mechanical joint 0.25 Compressor ... failure data on mechanical parts. Reference 43lists over 350 sources for obtaining various types of failure data. Table 20.2 presents failure rates forselected mechanical parts.REFERENCES1....