NAS（National Aerospace Standard），美国国家飞机标准，NAS页中所列的零件带有零件号。但是，并不是所有的NAS号都是零件号。
MS（Military Standard），美国军用标准
AN（ANSI-American National Standards Institute）美国国家标准
NASM（美国国家航空标准）
随着技术的进步，客户对高质量紧固件的期望和要求空前高涨。KATO推出了无安装柄螺纹护套（无尾钢丝螺套），这是当今市场上最先进的螺旋盘绕螺纹护套，彻底改变了行业。 Tangless无尾钢丝螺套是一种连续、螺旋盘绕、双向的线材设计。这种创新的设计允许使用位于线圈螺纹护套两端的驱动槽口而不是位于螺套一端的柄脚进行安装。因为KATO无柄螺纹护套两端都有一个槽口，所以在安装过程中无需定向插入件，从而节省了生产成本。但这还不是全部，一旦安装，KATO无柄护套在形状、配合和功能上与传统有柄护套相同(螺旋、螺旋、反冲等)。并安装到相同的STI螺纹孔中。
KATO无尾螺纹护套
KATO有尾钢丝螺套
加藤（KATO）Tangless CoilThread钢丝螺套现在是许多航空航天和国防公司的首选设计。KATO钢丝螺套已经过独立测试机构的彻底测试和仔细检查（测试报告可从KATO支持部门获得）。国家航空航天标准委员会（NASC）专门为加藤钢丝螺套发布了NAS1130和NA0276。此外，KATO螺纹护套被添加到NASM8846（螺旋盘绕螺纹嵌件的采购规范）。
KATO加藤螺纹护套可以与Heli-coil螺纹护套完美互换。
| Tangless 无尾螺纹护套 | |||
| CoilThread No. | NA/NAS No. | MS (Equivalent) | Helicoil No. |
| Unified Coarse 粗螺纹 | |||
| 2TNC-02C-0086 | NAS1130-02-10 | MS122095 | T1185-02C086 |
| 2TNC-02C-0129 | NAS1130-02-15 | MS122135 | T1185-02C129 |
| 2TNC-02C-0172 | NAS1130-02-20 | MS122175 | T1185-02C172 |
| 2TNC-02C-0215 | NAS1130-02-25 | MS122215 | --- |
| 2TNC-02C-0258 | NAS1130-02-30 | MS122255 | --- |
| 2TNC-04C-0112 | NAS1130-04-10 | MS122076 | T1185-04C112 |
| 2TNC-04C-0168 | NAS1130-04-15 | MS122116 | T1185-04C168 |
| 2TNC-04C-0224 | NAS1130-04-20 | MS122156 | T1185-04C224 |
| 2TNC-04C-0280 | NAS1130-04-25 | MS122196 | --- |
| 2TNC-04C-0336 | NAS1130-04-30 | MS122236 | --- |
| 2TNC-06C-0138 | NAS1130-06-10 | MS122078 | T1185-06C138 |
| 2TNC-06C-0207 | NAS1130-06-15 | MS122118 | T1185-06C207 |
| 2TNC-06C-0276 | NAS1130-06-20 | MS122158 | T1185-06C276 |
| 2TNC-06C-0345 | NAS1130-06-25 | MS122198 | --- |
| 2TNC-06C-0414 | NAS1130-06-30 | MS122238 | --- |
| 2TNC-2C-0164 | NAS1130-08-10 | MS122079 | T1185-2C164 |
| 2TNC-2C-0246 | NAS1130-08-15 | MS122119 | T1185-2C246 |
| 2TNC-2C-0328 | NAS1130-08-20 | MS122159 | T1185-2C328 |
| 2TNC-2C-0410 | NAS1130-08-25 | MS122199 | --- |
| 2TNC-2C-0492 | NAS1130-08-30 | MS122239 | --- |
| 2TNC-3C-0190 | NAS1130-3C-10 | MS122080 | T1185-3C190 |
| 2TNC-3C-0285 | NAS1130-3C-15 | MS122120 | T1185-3C285 |
| 2TNC-3C-0380 | NAS1130-3C-20 | MS122160 | T1185-3C380 |
| 2TNC-3C-0475 | NAS1130-3C-25 | MS122200 | --- |
| 2TNC-3C-0570 | NAS1130-3C-30 | MS122240 | --- |
| 2TNC-4C-0250 | NAS1130-4-10 | MS122081 | T1185-4C250 |
| 2TNC-4C-0375 | NAS1130-4-15 | MS122121 | T1185-4C375 |
| 2TNC-4C-0500 | NAS1130-4-20 | MS122161 | T1185-4C500 |
| 2TNC-4C-0625 | NAS1130-4-25 | MS122201 | --- |
| 2TNC-4C-0750 | NAS1130-4-30 | MS122241 | --- |
| 2TNC-5C-0312 | NAS1130-5C-10 | MS122082 | --- |
| 2TNC-5C-0469 | NAS1130-5C-15 | MS122122 | --- |
| 2TNC-5C-0625 | NAS1130-5C-20 | MS122162 | --- |
| 2TNC-5C-0781 | NAS1130-5C-25 | MS122202 | --- |
| 2TNC-5C-0938 | NAS1130-5C-30 | MS122242 | --- |
| 2TNC-6C-0375 | NAS1130-6C-10 | MS122083 | --- |
| 2TNC-6C-0562 | NAS1130-6C-15 | MS122123 | --- |
| 2TNC-6C-0750 | NAS1130-6C-20 | MS122163 | --- |
| 2TNC-6C-0938 | NAS1130-6C-25 | MS122203 | --- |
| --- | --- | MS122243 | --- |
| Unified Fine 细螺纹 | |||
| 2TNF-3C-0190 | NAS1130-3-10 | MS124655 | T1191-3C190 |
| 2TNF-3C-0285 | NAS1130-3-15 | MS124695 | T1191-3C285 |
| 2TNF-3C-0380 | NAS1130-3-20 | MS124735 | T1191-3C380 |
| 2TNF-3C-0475 | NAS1130-3-25 | MS124775 | --- |
| 2TNF-3C-0570 | NAS1130-3-30 | MS124815 | --- |
| 2TNF-4C-0250 | NAS1130-4F-10 | MS124656 | T1191-4C250 |
| 2TNF-4C-0375 | NAS1130-4F-15 | MS124696 | T1191-4C375 |
| 2TNF-4C-0500 | NAS1130-4F-20 | MS124736 | T1191-4C500 |
| 2TNF-4C-0625 | NAS1130-4F-25 | MS124776 | --- |
| 2TNF-4C-0750 | NAS1130-4F-30 | MS124816 | --- |
| 2TNF-5C-0312 | NAS1130-5F-10 | MS124657 | --- |
| 2TNF-5C-0469 | NAS1130-5F-15 | MS124697 | --- |
| 2TNF-5C-0625 | NAS1130-5F-20 | MS124737 | --- |
| 2TNF-5C-0781 | NAS1130-5F-25 | MS124777 | --- |
| 2TNF-6C-0375 | NAS1130-6F-10 | MS124658 | --- |
| 2TNF-6C-0562 | NAS1130-6F-15 | MS124698 | --- |
| 2TNF-6C-0750 | NAS1130-6F-20 | MS124738 | --- |
| Metric 公制 | |||
| 2TNM-2X.4C-2 | --- | MA3279-140 | --- |
| 2TNM-2X.4C-3 | --- | MA3279-190 | --- |
| 2TNM-2X.4C-4 | --- | MA3279-240 | --- |
| 2TNM-2.5X.45C-2.5 | NA0276M2A-10 | MA3279-101 | T1084-2.5C025 |
| 2TNM-2.5X.45C-3.8 | NA0276M2A-15 | MA3279-151 | T1084-2.5C038 |
| 2TNM-2.5X.45C-5 | NA0276M2A-20 | MA3279-201 | T1084-2.5C050 |
| 2TNM-2.5X.45C-6.3 | NA0276M2A-25 | MA3279-251 | --- |
| 2TNM-2.5X.45C-7.5 | NA0276M2A-30 | MA3279-301 | --- |
| 2TNM-3X.5C-3 | NA0276M3-10 | MA3279-102 | T1084-3C030 |
| 2TNM-3X.5C-4.5 | NA0276M3-15 | MA3279-152 | T1084-3C045 |
| 2TNM-3X.5C-6 | NA0276M3-20 | MA3279-202 | T1084-3C060 |
| 2TNM-3X.5C-7.5 | NA0276M3-25 | MA3279-252 | --- |
| 2TNM-3X.5C-9 | NA0276M3-30 | MA3279-302 | --- |
| 2TNM-4X.7C-4 | NA0276M4-10 | MA3279-104 | T1084-4C040 |
| 2TNM-4X.7C-6 | NA0276M4-15 | MA3279-154 | T1084-4C060 |
| 2TNM-4X.7C-8 | NA0276M4-20 | MA3279-204 | T1084-4C080 |
| 2TNM-4X.7C-10 | NA0276M4-25 | MA3279-254 | --- |
| 2TNM-4X.7C-12 | NA0276M4-30 | MA3279-304 | --- |
| 2TNM-5X.8C-5 | NA0276M5-10 | MA3279-105 | T1084-5C050 |
| 2TNM-5X.8C-7.5 | NA0276M5-15 | MA3279-155 | T1084-5C075 |
| 2TNM-5X.8C-10 | NA0276M5-20 | MA3279-205 | T1084-5C100 |
| 2TNM-5X.8C-12.5 | NA0276M5-25 | MA3279-255 | --- |
| 2TNM-5X.8C-15 | NA0276M5-30 | MA3279-305 | --- |
| 2TNM-6X1C-6 | NA0276M6-10 | MA3279-106 | T1084-6C060 |
| 2TNM-6X1C-9 | NA0276M6-15 | MA3279-156 | T1084-6C090 |
| 2TNM-6X1C-12 | NA0276M6-20 | MA3279-206 | T1084-6C120 |
| 2TNM-6X1C-15 | NA0276M6-25 | MA3279-256 | --- |
| 2TNM-6X1C-18 | NA0276M6-30 | MA3279-306 | --- |
| 2TNM-8X1.25C-8 | NA0276M8-10 | MA3279-109 | --- |
| 2TNM-8X1.25C-12 | NA0276M8-15 | MA3279-159 | --- |
| 2TNM-8X1.25C-16 | NA0276M8-20 | MA3279-209 | --- |
| 2TNM-8X1.25C-20 | NA0276M8-25 | MA3279-259 | --- |
| 2TNM-8X1.25C-24 | NA0276M8-30 | MA3279-309 | --- |
| 2TNM-10X1.5C-10 | NA0276M10-10 | MA3279-111 | --- |
| 2TNM-10X1.5C-15 | NA0276M10-15 | MA3279-161 | --- |
| 2TNM-10X1.5C-20 | NA0276M10-20 | MA3279-211 | --- |
| 2TNM-10X1.5C-25 | NA0276M10-25 | MA3279-261 | --- |
| 2TNM-12X1.75C-12 | NA0276M12-10 | MA3279-114 | --- |
| 2TNM-12X1.75C-18 | NA0276M12-15 | MA3279-164 | --- |
| 2TNM-12X1.75C-24 | NA0276M12-20 | MA3279-214 | --- |
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