scope:

PURPOSE.

The purpose of this manual is to present general fastener guidelines for the shipbuilding activities engaged in the overhaul, repair, and conversion of combatant submarines. It contains the basic techniques that are currently used for tightening threaded fasteners used in mechanical joints aboard combatant submarines. For the purposes of this manual, representative pressure-containing systems are listed in Table 2-1. This manual should not be construed as providing rigid procedures for tightening fasteners or to discourage initiative and innovation in the use of new methods or techniques for obtaining properly tightened fastening systems. Nor should the torque values given in various tables herein be construed as superseding the fastener torque values listed in applicable drawings and technical manuals. The tables in this manual give acceptable torque values for use when none are stated in applicable drawings and technical manuals (see section 5 for further discussion). The principles put forth in this manual apply whether the fasteners in question are sized by the English or metric systems of measure- ment. To establish torques for metric fasteners, use Appendix E of this manual.