紧定套用于将圆锥孔调心轴承（调心球轴承、调心滚子轴承）固定在无轴肩轴上，结构简单，工作可靠，轴承调换方便、广泛使用于纺织、轻工、造纸、冶金、皮带运输及输送设备等行业。
紧定套由紧定衬套、锁紧螺母、锁紧垫圈（或锁紧卡）等零件组成。带有锁紧螺母和锁紧垫圈的紧定套只能整套地互换。不同来源的零配件不能互换。
NSK SKF
| H204 |
| H205 |
| H206 |
| H207 |
| H208 |
| H209 |
| H210 |
| H211 |
| H212 |
| H213 |
| H214 |
| H215 |
| H216 |
| H217 |
| H218 |
| H219 |
| H220 |
| H221 |
| H222 |
| H304 |
| H305 |
| H306 |
| H307 |
| H308 |
| H309 |
| H310 |
| H311 |
| H312 |
| H313 |
| H314 |
| H315 |
| H316 |
| H317 |
| H318 |
| H319 |
| H320 |
| H321 |
| H322 |
| H2304 |
| H2305 |
| H2306 |
| H2307 |
| H2308 |
| H2309 |
| H2310 |
| H2311 |
| H2312 |
| H2313 |
| H2314 |
| H2315 |
| H2316 |
| H2317 |
| H2318 |
| H2319 |
| H2320 |
| H2321 |
| H2322 |
| H2324 |
| H2326 |
| H2328 |
| H2330 |
| H2332 |
| H2334 |
| H2336 |
| H2338 |
| H2340 |
| H2344 |
| H2348 |
| H2352 |
| H2356 |
| H3260 |
| H3264 |
| H3268 |
| H3272 |
| H3276 |
| H3280 |
| H3284 |
| H3288 |
| H3292 |
| H3296 |
| H3024 |
| H3026 |
| H3028 |
| H3030 |
| H3032 |
| H3034 |
| H3036 |
| H3038 |
| H3040 |
| H3044 |
| H3048 |
| H3052 |
| H3056 |
| H3060 |
| H3064 |
| H3068 |
| H3072 |
| H3076 |
| H3080 |
| H3084 |
| H3088 |
| H3092 |
| H3096 |
| H3120 |
| H3122 |
| H3124 |
| H3126 |
| H3128 |
| H3130 |
| H3132 |
| H3134 |
| H3036 |
| H3138 |
| HH3140 |
| H3144 |
| H3148 |
| H3152 |
| H3156 |
| H3160 |
| H3164 |
| H3168 |
| H3172 |
| H3176 |
| H3180 |
| H3184 |
| H3188 |
| H3192 |
| H3196 |
