Screw Thread Insert (STI) Taps
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| TPI | STRAIGHT FLUTE | SPIRAL POINT | ||||||||
| Size | UNC | UNF | H Limit |
No. of Flutes |
Thread Length |
OAL | PLUG Part Number |
BOTTOM Part Number |
No. of Flutes |
PLUG Part Number |
| 2 | 56 | — | H1 | 3 | 7/16 | 1-3/4 | MCT-34149 | MCT-34049 | 2 | MCT-33858 |
| 56 | — | H2 | 3 | 7/16 | 1-3/4 | MCT-34150 | MCT-34050 | 2 | MCT-33859 | |
| 4 | 40 | — | H1 | 3 | 9/16 | 1-7/8 | MCT-34151 | MCT-34051 | 2 | MCT-33860 |
| 40 | — | H2 | 3 | 9/16 | 1-7/8 | MCT-34152 | MCT-34052 | 2 | MCT-33861 | |
| 5 | 40 | — | H1 | 3 | 5/8 | 1-15/16 | MCT-34153 | MCT-34053 | 2 | MCT-33862 |
| 40 | — | H2 | 3 | 5/8 | 1-15/16 | MCT-34154 | MCT-34054 | 2 | MCT-33863 | |
| 6 | 32 | — | H2 | 3 | 11/16 | 2 | MCT-34155 | MCT-34055 | 2 | MCT-33864 |
| 32 | — | H3 | 3 | 11/16 | 2 | MCT-34156 | MCT-34056 | 2 | MCT-33865 | |
| — | 40 | H1 | 3 | 11/16 | 2 | MCT-34157 | MCT-34057 | 2 | MCT-33866 | |
| — | 40 | H2 | 3 | 11/16 | 2 | MCT-34158 | MCT-34058 | 2 | MCT-33867 | |
| 8 | 32 | — | H2 | 3 | 3/4 | 2-1/8 | MCT-34159 | MCT-34059 | 2 | MCT-33868 |
| 32 | — | H3 | 3 | 3/4 | 2-1/8 | MCT-34160 | MCT-34060 | 2 | MCT-33869 | |
| 10 | 24 | — | H2 | 3 | 7/8 | 2-3/8 | MCT-34161 | MCT-34061 | 2 | MCT-33870 |
| 24 | — | H3 | 3 | 7/8 | 2-3/8 | MCT-34162 | MCT-34062 | 2 | MCT-33871 | |
| — | 32 | H2 | 3 | 7/8 | 2-3/8 | MCT-34163 | MCT-34063 | 2 | MCT-33872 | |
| — | 32 | H3 | 3 | 7/8 | 2-3/8 | MCT-34164 | MCT-34064 | 2 | MCT-33873 | |
| 12 | 24 | — | H2 | 3 | 15/16 | 2-3/8 | MCT-34165 | MCT-34065 | 2 | MCT-33874 |
| 24 | — | H3 | 3 | 15/16 | 2-3/8 | MCT-34166 | MCT-34066 | 2 | MCT-33875 | |
| 1/4 | 20 | — | H2 | 3 | 1 | 2-1/2 | MCT-34167 | MCT-34067 | 2 | MCT-33876 |
| 20 | — | H3 | 3 | 1 | 2-1/2 | MCT-34168 | MCT-34068 | 2 | MCT-33877 | |
| — | 28 | H2 | 3 | 1 | 2-1/2 | MCT-34169 | MCT-34069 | 2 | MCT-33878 | |
| — | 28 | H3 | 3 | 1 | 2-1/2 | MCT-34170 | MCT-34070 | 2 | MCT-33879 | |
| 5/16 | 18 | — | H3 | 4 | 1-1/8 | 2-23/32 | MCT-34171 | MCT-34071 | 3 | MCT-33880 |
| 18 | — | H4 | 4 | 1-1/8 | 2-23/32 | MCT-34172 | MCT-34072 | 3 | MCT-33881 | |
| — | 24 | H2 | 4 | 1-1/8 | 2-23/32 | MCT-34173 | MCT-34073 | 3 | MCT-33882 | |
| — | 24 | H3 | 4 | 1-1/8 | 2-23/32 | MCT-34174 | MCT-34074 | 3 | MCT-33883 | |
| 3/8 | 16 | — | H3 | 4 | 1-1/4 | 2-15/16 | MCT-34175 | MCT-34075 | 3 | MCT-33884 |
| 16 | — | H4 | 4 | 1-1/4 | 2-15/16 | MCT-34176 | MCT-34076 | 3 | MCT-33885 | |
| — | 24 | H2 | 4 | 1-1/4 | 2-15/16 | MCT-34177 | MCT-34077 | 3 | MCT-33886 | |
| — | 24 | H3 | 4 | 1-1/4 | 2-15/16 | MCT-34178 | MCT-34078 | 3 | MCT-33887 | |
| 7/16 | 14 | — | H3 | 4 | 1-7/16 | 3-5/32 | MCT-34179 | MCT-34079 | 3 | MCT-33888 |
| 14 | — | H4 | 4 | 1-7/16 | 3-5/32 | MCT-34180 | MCT-34080 | 3 | MCT-33889 | |
| — | 20 | H3 | 4 | 1-7/16 | 3-5/32 | MCT-34181 | MCT-34081 | 3 | MCT-33890 | |
| — | 20 | H4 | 4 | 1-7/16 | 3-5/32 | MCT-34182 | MCT-34082 | 3 | MCT-33891 | |
| 1/2 | 13 | — | H3 | 4 | 1-21/32 | 3-3/8 | MCT-34183 | MCT-34083 | 3 | MCT-33892 |
| 13 | — | H4 | 4 | 1-21/32 | 3-3/8 | MCT-34184 | MCT-34084 | 3 | MCT-33893 | |
| — | 20 | H3 | 4 | 1-21/32 | 3-3/8 | MCT-34185 | MCT-34085 | 3 | MCT-33894 | |
| — | 20 | H4 | 4 | 1-21/32 | 3-3/8 | MCT-34186 | MCT-34086 | 3 | MCT-33895 | |