IFI 100/107 Prevailing-Torque Steel Nuts
IFI-100/107 covers steel prevailing-torque hex nuts and hex-flange nuts. Drawing shows the flange-nut form and its key dimensions.
Selected flange-nut dimensions (in)
| Thread | UNC | s max | s min | e max | m max | dc max | h min |
|---|---|---|---|---|---|---|---|
| 1/4 | 20 | .4385 | .428 | .505 | .300 | .560 | .04 |
| 5/16 | 18 | .5020 | .489 | .577 | .365 | .680 | .05 |
| 3/8 | 16 | .5645 | .551 | .650 | .425 | .810 | .06 |
| 1/2 | 13 | .7520 | .736 | .866 | .555 | 1.070 | .08 |
| 5/8 | 11 | .9395 | .922 | 1.083 | .690 | 1.330 | .10 |
| 3/4 | 10 | 1.1270 | 1.088 | 1.299 | .825 | 1.585 | .11 |
Selected flange-nut data. IFI-100/107 was withdrawn in 2007; check applicable replacement requirements, including ASME B18.16.6.