Thin Height Light Hex
| Part Number | Nominal Size | F | G | H | I | |
| Across Flats | Across Corner | Height | Side Height | |||
| Max | Min | |||||
| 21FK-632 | 6-32 | .313 | .305 | .339 | .141 | .036 |
| 21FK-640 | 6-40 | .313 | .305 | .339 | .141 | .036 |
| 21FK-832 | 8-32 | .345 | .336 | .374 | .188 | .070 |
| 21FK-836 | 8-36 | .345 | .336 | .374 | .188 | .070 |
| 21FK-1024 | 10-24 | .376 | .367 | .410 | .188 | .065 |
| 21FK-1032 | 10-32 | .376 | .367 | .410 | .188 | .065 |
| 21FK-1224 | 12-24 | .439 | .430 | .482 | .209 | .071 |
| 21FK-1228 | 12-28 | .439 | .430 | .482 | .209 | .071 |
| 21FK-420 | 1/4-20 | .439 | .430 | .482 | .219 | .075 |
| 21FK-428 | 1/4-28 | .439 | .430 | .482 | .219 | .075 |
| 21FKF-518 | 5/16-18 | .502 | .492 | .552 | .266 | .097 |
| 21FK-524 | 5/16-24 | .502 | .492 | .552 | .266 | .097 |
| 21FKF 616 | 3/8-16 | .564 | .553 | .622 | .282 | .108 |
| 21FK-624 | 3/8-24 | .564 | .553 | .622 | .282 | .108 |
| 21FKF 714 | 7/16-14 | .627 | .616 | .696 | .328 | .138 |
| 21FK-720 | 7/16-20 | .627 | .616 | .696 | .328 | .138 |
| 21FKF 813 | 1/2-13 | .752 | .741 | .837 | .328 | .121 |
| 21FK-820 | 1/2-20 | .752 | .741 | .837 | .328 | .121 |
| 21FK-912 | 9/16-12 | .877 | .865 | .978 | .368 | .135 |
| 21FK-918 | 9/16-18 | .877 | .865 | .978 | .368 | .135 |
| 21FKF 1011 | 5/8-11 | .940 | .928 | 1.051 | .399 | .147 |
| 21FK-1018 | 5/8-18 | .940 | .928 | 1.051 | .399 | .147 |
| 21FKF 1210 | 3/4-10 | 1.064 | .1052 | 1.191 | .415 | .155 |
| 21FK-1216 | 3/4-16 | 1.064 | 1.052 | 1.191 | .415 | .155 |
| 21FKF 1409 | 7/8-9 | 1.252 | 1.239 | 1.403 | .477 | .166 |
| 21FK-1414 | 7/8-14 | 1.252 | 1.239 | 1.403 | .477 | .166 |
| 21FKF 1608 | 1-8 | 1.440 | 1.427 | 1.615 | .571 | .218 |
| 21FK-1612 | 1-12 | 1.440 | 1.427 | 1.615 | .571 | .218 |
| 21FK-1614 | 1/14 | 1.440 | 1.427 | 1.615 | .571 | .218 |
| 21FK-1812 | 1 1/8-12 | 1.627 | 1.614 | 1.826 | .634 | .238 |
| 21FK-2012 | 1 1/4-12 | 1.814 | 1.801 | 2.038 | .759 | .311 |
| 21FK-2212 | 1 3/8-12 | 2.002 | 1.998 | 2.269 | .821 | .325 |
| 21FK-2412 | 1 1/2-12 | 2.190 | 2.176 | 2.484 | .884 | .350 |
Dimensions per SPS Technologies
Disclaimer: The dimensions listed are for reference only. Sizes not listed may be available off the shelf or can be manufactured to customer requirements.