National oil seals是美國輝門公司旗下國際**密封件品牌，已有60多年高品質密封件的生產經驗，為工業和輕型商用車輛提供優越的密封解決方案。是眾多發動機、工業機械的原廠配套件。
National主要產品：
軸修理包 、 軸套 、油封、定制密封裝置

部分產品型號：national 1037、national 1041、national 1049、national 1070 、national 1097 、national 1097N 、national 1110 、national 1192 、national 1195 、national 1873 、national 1906 、national 1949 、national 1952 、national 1959 、national 1999 、national 2043 、national 2054 、national 2055 、national 2064 、national 2081 、national 2093H 、national 2102 、national 2146 、national 2151H 、national 2175 、national 2194 、national 2205 、national 2207 、national 2222 、national 2260 、national 2286 、national 2287 、national 2674 、national 2689 、national 2689S 、national 3905 、national 3909 、national 3942 、national 3945 、national 3946 、national 3948 、national 3983 、national 4019N 、national 4026 、national 4035N 、national 4037 、national 4038N 、national 4051 、national 4072 、national 4072N 、national 4075 、national 4084 、national 4099 、national 4101 、national 4122 、national 4131 、national 4141 、national 4491