When searching for the dimensions for JST’s HL Series Locking Connector Headers, you’ll find it’s not shown on the datasheet. You can refer to the following information:
As an example, for part number B04P-HL-A(LF)(SN):
JST confirmed the dimensions of the Locking Connector Headers:
Seated Height: 13.35 mm
Overall Height: 16.62 mm
Applicable part numbers
455-3557-ND
455-3558-ND
455-3559-ND
B04P-HL-A(LF)(SN)
B08P-HL-A(LF)(SN)
B12P-HL-A(LF)(SN)