BM15FR Series Connectors Hirose Electric BM15FR Series Connectors are PCB-to-PCB and PCB-to-FPC connectors that use metal fitting in the locking mechanism to ensure high retention strength. The BM15FR Series features a space-saving design with a 2mm max. depth and a 0.35mm pitch. The connectors offer high contact reliability with a low 2-point contact structure, while maintaining a low mated height of 0.7 or 0.8mm. The BM15FR Connectors have a lock mechanism where the plug contact absorbs forces caused by impact and vibration.