Threading: Coil Inserts
Coil insert threading is available for UNC, UNF, and metric threads on both milled and turned parts. Coil inserts are only available for plastics and soft metals such as aluminum, brass, and copper.
UNC threads | Minimum modeled diameter (in.) | Maximum modeled diameter (in.) | 75% hole drill size (in.) | Maximum thread depth (in.)* |
---|---|---|---|---|
#2-56 | 0.090 | 0.096 | 0.091 | 0.300 |
#3-48 | 0.105 | 0.110 | 0.107 | 0.400 |
#4-40 | 0.117 | 0.125 | 0.119 | 0.400 |
#5-40 | 0.131 | 0.137 | 0.132 | 0.400 |
#6-32 | 0.145 | 0.153 | 0.147 | 0.600 |
#8-32 | 0.171 | 0.178 | 0.173 | 0.600 |
#10-24 | 0.199 | 0.208 | 0.201 | 0.650 |
#12-24 | 0.225 | 0.234 | 0.227 | 0.650 |
1/4-20 | 0.261 | 0.270 | 0.266 | 0.650 |
5/16-18 | 0.324 | 0.334 | 0.332 | 1.000 |
3/8-16 | 0.389 | 0.399 | 0.397 | 1.200 |
7/16-14 | 0.453 | 0.464 | 0.453 | 1.200 |
1/2-13 | 0.515 | 0.531 | 0.531 | 1.200 |
UNF threads | Minimum modeled diameter (in.) | Maximum modeled diameter (in.) | 75% hole drill size (in.) | >Maximum thread depth (in.)* |
---|---|---|---|---|
#2-64 | 0.090 | 0.095 | 0.092 | 0.300 |
#3-56 | 0.103 | 0.104 | 0.104 | 0.300 |
#4-48 | 0.117 | 0.123 | 0.120 | 0.400 |
#6-40 | 0.144 | 0.150 | 0.148 | 0.600 |
#8-36 | 0.170 | 0.177 | 0.174 | 0.600 |
#10-32 | 0.197 | 0.204 | 0.200 | 0.650 |
1/4-28 | 0.258 | 0.265 | 0.261 | 0.650 |
5/16-24 | 0.322 | 0.329 | 0.325 | 1.000 |
3/8-24 | 0.384 | 0.391 | 0.387 | 1.000 |
7/16-20 | 0.448 | 0.456 | 0.452 | 1.200 |
1/2-20 | 0.511 | 0.519 | 0.515 | 1.200 |
Metric threads | Minimum modeled diameter (mm) | Maximum modeled diameter (mm) | 75% hole drill size (mm) | Maximum thread depth (mm)* |
---|---|---|---|---|
M2 x 0.4 | 2.09 | 2.14 | 2.14 | 5.08 |
M2.5 x 0.45 | 2.55 | 2.65 | 2.60 | 7.62 |
M3 x 0.5 | 3.11 | 3.25 | 3.18 | 10.16 |
M3.5 x 0.6 | 3.68 | 3.79 | 3.70 | 15.24 |
M4 x 0.7 | 4.15 | 4.33 | 4.24 | 15.24 |
M5 x 0.8 | 5.17 | 5.37 | 5.27 | 16.51 |
M6 x 1.0 | 6.22 | 6.41 | 6.31 | 16.51 |
M8 x 1.25 | 8.27 | 8.48 | 8.38 | 25.40 |
M10 x 1.5 | 10.33 | 10.56 | 10.56 | 30.48 |
M12 x 1.75 | 12.38 | 12.64 | 12.51 | 30.48 |