PTH

PTH may refer to:

• Parathyroid hormone
• Pin through hole, mounting scheme used in electronics with component leads inserted through drilled holes
• Plated through hole, used in electronics to connect layers with plated through hole vias
• Polskie Towarzystwo Historyczne
• Protest the Hero, a Canadian progressive metal band from Whitby, Ontario
• GNU Portable Threads, a thread library
• The station code for Perth railway station, Scotland
• Port Huron (Amtrak station), Michigan, United States; Amtrak station code PTH
• Phenolphthalein, an indicator used in chemical reactions to indicate the presence of a base
• Parsippany-Troy Hills, a township in New Jersey, United States
• phenylthiohydantoin - a type of amino acid derivative formed by the Edman degradation
• Phantom time hypothesis, a proposed theory that a calendar change explains the lack of archaeology coinciding with the Early Middle Ages