Assertion: fire sprinkler | /r/HasProperty | cast with hex-shaped protrusion
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Source sentences:
text: Fire sprinklers in Victaulic's V27 series and Victaulic's V34 series – including the 5.6K V2703 and V2704 and the 8.0K V3401 and V3402 – are cast with a hex-shaped protrusion, called a wrench boss, designed to provide a contact surface for wrenches to securely grip, rotate, and install sprinklers in the correct orientation.