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Tydrillbits supply kinds of mining PDC drill bits and rock drilling tools. We also provide types of drill rods, such as nq drill rod, hollow drill rod and taper drill pipes. This article we talk about thread standard of the drill pipe and drill bits.
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API standard connect thread specification
| API thread | Pin end diameter/mm | Box end diameter/mm |
| NC26=2 3/8"IF | 60.35 | 74.61 |
| NC31= 2 7/8"IF | 71.31 | 87.71 |
| NC38=3 1/2"IF | 85.06 | 103.58 |
| NC40=4"FH | 89.06 | 110.33 |
| NC44 | 98.42 | 119.06 |
| NC46=4"IF | 103.73 | 124.61 |
| NC50=4 1/2"IF | 114.30 | 134.91 |
| 2 3/8"REG | 47.62 | 68.20 |
| 2 7/8"REG | 53.97 | 77.78 |
| 3 1/2"REG | 65.07 | 90.48 |
IF=internal flush; FH=full hole; REG=regular | ||
Tydrillbits manufacture kinds of mining PDC drill bits, When you send inquiry to us, please tell us the PDC drilling bit diameter and connect thread, application, etc. More information is good for us to provide an exact price. Welcome to send inquiry to us.
