Rotary Shouldered Connection (RSC) Failures and Causes. By Peter Sharpe – CEO Sharpe Engineering   Seal or Shoulder Damage Seal or shoulder damage is the most common damage to Rotary Shouldered Connections and is the most overlooked.  A damaged shoulder or seal can be catastrophic, and in a very short time lead to connection failure and … Continue reading Peter Sharpe Talks: Rotary Shouldered Connection (RSC) Failures and Causes