Nati ya hexagonal ni aina ya kifunga chuma ambacho kina pande sita.Karanga nyingi hukatwa kwa sura ya hexagonal, kwa kuwa inaonekana kuwa sura rahisi zaidi kufahamu.Karanga, kwa namna yoyote ile, karibu hutumika kwa kipekee kufunga boliti kwenye kitu kingine. ambacho hutumika pamoja na kifunga chenye nyuzi kutoka nje kama vile skrubu ya kichwa cha hex, boliti ya kubebea mizigo, au kitambaa chenye uzi.Hex Nuts hugeuka na wrench au tundu.
Hex nuts Vipimo vinafafanuliwa katika kipimo na kifalme kwa pamoja natinao coarse lami(UNC),na sauti ndogo (UNF),BSW na uzi wa kipimo .
Metric & Multistandard Components Corp. hutoa Nuts za Hexagon za Metric katika nyenzo nyingi tofauti ikiwa ni pamoja na Madarasa ya Mali 4, 8, 10, na 12, Chuma cha pua.
| Ukubwa | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 1/2 BSW | 9/16 | 5/8 | 3/4 |
| TPI | 20G | 18G | 16G | 14G | 13G | 12G | 12G | 11G | 10G |
| A/F | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 13/16 | 13/16 | 15/16 | 1-1/8 |
| Urefu | 5.8MM | 7.0MM | 8.6MM | 9.8MM | 11.4MM | 11.4MM | 12.6MM | 14.2MM | 16.9MM |
| Ukubwa | 7/8 | 1" | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | 1-3/4 | 2" |
| TPI | 9G | 8G | 7G | 7G | 6G | 6G | 5G | 4.5G |
| A/F | 1-5/16 | 1-1/2 | 1-11/16 | 1-7/8 | 2-1/16 | 2-1/4 | 2-5/8 | 3" |
| Urefu | 19.7MM | 22.5MM | 25.4MM | 27.8MM | 30.7MM | 33.5MM | 38.1MM |
