This Aerospace Standard establishes the diameter - pitch combinations of ISO metric 60 screw threads recommended for use in the aerospace industry for metric module shaft of bearing retaining screw threads.
Procedure for obtaining the corrected heat-rating values (indicated mean effective pressure, IMEP) of spark plugs rated in the SAE 17.6 cubic inch rating engine (SAE AS840).
These specifications contain general information about the characteristics of ignition systems and measuring techniques; recommended types of voltage dividers and output indicators; calibration procedures.
This report includes a procedure for typical pulse voltage measurement using the pressurized ball gap, calibration procedure, and a description of the pressurized ball gap.