Circuit Board Hardware - PCB M3 x 19mm HEX 4.9mm A/F
六角 有螺纹 M3x0.5 黄铜 0.748"（19.00mm）
得捷:
HEX STANDOFF M3X0.5 BRASS 19MM
艾睿:
Spacer Hex 19.05mm-LG Brass Nickel
安富利:
M3 Threaded Hexagonal Brass Spacer, 5mm A/F, 19.05mm 0.75" body length, Nickel finish
