PFS2                                                                                         PFC2

螺纹:                                                                                      螺纹:
外螺纹, ANSI B1.1, 2A ANSI/ASME B1.13M, 6g                           外螺纹, ANSI B1.1, 2A ANSI/ASME B1.13M, 6g
材质:                                                                                      材质:
定位圈：经热处理的碳钢                                                        定位圈: 300系列不锈钢

螺丝：碳钢                                                                              螺丝: 300系列不锈钢
弹簧：300系列不锈钢                                                                弹簧: 300 系列不锈钢
表面处理:                                                                                 表面处理:
定位圈: CN - 镀亮镍                                                                定位圈:钝化
螺丝：CN - 镀亮镍                                                                   螺丝：钝化

适用面板硬度:                                                                        适用面板硬度
不高于HRB 80 (洛氏硬度“B”制)                                              不高于HRB 70 (洛氏硬度“B”制)
不高于HB 150 (布氏硬度)                                                        不高于HB 125 (布氏硬度)