NSTS 08307A, SPACE SHUTTLE CRITERIA FOR PRELOADED BOLTS (06 JUL 1998)

NSTS 08307A, SPACE SHUTTLE CRITERIA FOR PRELOADED BOLTS (06 JUL 1998)., The methodology and criteria defined in this document shall be applicable when it is determined that a bolted joint requires preloading to successfully perform its function. Generally, bolts that experience increased axial tensile loads as a result of the applied external load will require preloading to reduce cyclic stresses, prevent pressure leakage, prevent joint separation, or increase system stiffness. This methodology and criteria provides a set of minimum requirements which are adequate, but not overly conservative, so that the design and analysis of preloaded joints are addressed in a consistent and acceptable manner throughout the Space Shuttle Program.