“B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size. The letter “J” indicates a 12 mm x 1.25 size with two ground electrodes. เวป100 น่าจะใช้ c7hsa  ขึ้นต้นด้วยc เกลียว 10X1