BS EN IEC 61837-2:2018 Surface mounted piezoelectric devices for frequency control and selection. Standard outlines and terminal lead connections Ceramic enclosures

Surface mounting devices
Electrical components
Shape
Frequency control
Ceramics
Surface mounting
Enclosures
Piezoelectric devices
Electric enclosures
Electric terminals
Electronic equipment and components
Selection
Electrical connections

Link: BS EN IEC 61837-2:2018 Surface mounted piezoelectric devices for frequency control and selection. Standard outlines and terminal lead connections Ceramic enclosures
Source: BSI Standards