IPC-7351B Naming Convention for Crystals, HC-49 (XTAL) Surface Mount

XTAL + Body Length X Body Width X Height

Example:

XTAL1170X500X450N_HC-49US-D_MMD_Components

XTAL – Surface Mount Quartz Crystals, HC-49, 2 Pins
1170 – Body Length = 11.70mm
500 – Body Width = 5.00mm
450 – Height = 4.50mm
HC-49US-D – Manufacturer Code/Package Name (Added by PCB-3D.com)
MMD_Components – Manufacturer Name (Added by PCB-3D.com)