NSTS 08307A, NASA SPACE TRANSPORTATION SYSTEM: SPACE SHUTTLE CRITERIA FOR PRELOADED BOLTS (06-JUL-1998)

NSTS 08307A, NASA SPACE TRANSPORTATION SYSTEM: 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.