A surgical instrument, comprising: (a) an instrument body; (b) an ultrasonic transducer assembly rotatably mounted along a longitudinal axis within the instrument body; and (c) a slip lock operatively connected to the instrument body and configured to selectively move between a disengaged position and an engaged position, wherein the ultrasonic transducer assembly is configured to be selectively rotatable about the longitudinal axis in the disengaged position, wherein the slip lock includes: (i) an engagement feature secured to the ultrasonic transducer assembly such that the engagement feature is configured to rotate with the ultrasonic transducer feature, (ii) a catch surface configured to engage the engagement feature with the slip lock in the engaged position to thereby selectively inhibit rotation of the engagement feature and the ultrasonic transducer assembly about the longitudinal axis for rotatably coupling with an acoustic waveguide up to a predetermined torque, and (iii) a resiliently deflectable detent arm configured to releasably engage a portion of instrument body with the slip lock in the engaged position to releasably secure the catch surface in the engaged position, wherein the engagement feature is configured to urge the catch surface toward the disengaged position upon the ultrasonic transducer assembly receiving a torque greater than the predetermined torque such that the detent arm resiliently deflects to release the portion of the instrument body and the ultrasonic transducer assembly slips relative to the catch surface for limiting coupling of the ultrasonic transducer assembly with the acoustic waveguide to the predetermined torque, wherein the instrument body includes a switch channel, a lock switch movably mounted in the switch channel, and wherein the lock switch is configured to be manipulated by a user between the locked and unlocked positions, and wherein the lock switch is configured to selectively translate along a transverse direction between the unlocked and the locked position to selectively translate the catch surface transversely between the disengaged position and the engaged position. (a) an instrument body; (b) an ultrasonic transducer assembly rotatably mounted along a longitudinal axis within the instrument body; and (c) a slip lock operatively connected to the instrument body and configured to selectively move between a disengaged position and an engaged position, wherein the ultrasonic transducer assembly is configured to be selectively rotatable about the longitudinal axis in the disengaged position, wherein the slip lock includes: (i) an engagement feature secured to the ultrasonic transducer assembly such that the engagement feature is configured to rotate with the ultrasonic transducer feature, (ii) a catch surface configured to engage the engagement feature with the slip lock in the engaged position to thereby selectively inhibit rotation of the engagement feature and the ultrasonic transducer assembly about the longitudinal axis for rotatably coupling with an acoustic waveguide up to a predetermined torque, and (iii) a resiliently deflectable detent arm configured to releasably engage a portion of instrument body with the slip lock in the engaged position to releasably secure the catch surface in the engaged position, (i) an engagement feature secured to the ultrasonic transducer assembly such that the engagement feature is configured to rotate with the ultrasonic transducer feature, (ii) a catch surface configured to engage the engagement feature with the slip lock in the engaged position to thereby selectively inhibit rotation of the engagement feature and the ultrasonic transducer assembly about the longitudinal axis for rotatably coupling with an acoustic waveguide up to a predetermined torque, and (iii) a resiliently deflectable detent arm configured to releasably engage a portion of instrument body with the slip lock in the engaged position to releasably secure the catch surface in the engaged position, wherein the engagement feature is configured to urge the catch surface toward the disengaged position upon the ultrasonic transducer assembly receiving a torque greater than the predetermined torque such that the detent arm resiliently deflects to release the portion of the instrument body and the ultrasonic transducer assembly slips relative to the catch surface for limiting coupling of the ultrasonic transducer assembly with the acoustic waveguide to the predetermined torque, wherein the instrument body includes a switch channel, a lock switch movably mounted in the switch channel, and wherein the lock switch is configured to be manipulated by a user between the locked and unlocked positions, and wherein the lock switch is configured to selectively translate along a transverse direction between the unlocked and the locked position to selectively translate the catch surface transversely between the disengaged position and the engaged position.