Round dies and hexagon die nuts for UNF, Unified fine thread
UNF has more threads per inch than UNC at the same diameter. It carries better in thin-walled parts and holds preload under vibration — common in automotive and aerospace work. Dies cut external threads on bolts, rods and pipes. The round die sits in a die holder; the hexagon die nut is turned with an open-ended spanner and therefore also works during assembly.
VÖLKEL offers 86 versions to BS 1127, DIN 223, DIN 382 and DIN EN 22568, in HSS, from UNF No. 0 x 80 to UNF 1.1/2 x 12.
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All sizes at a glance
86 articles in 3 series. The article number links straight to the tool.
Round Die DIN 223 (DIN EN 22568) HSS
| Threadnominal size | Article no. | o/d 65.0 mm | o/d 75.0 mm |
|---|---|---|---|
| UNF No. 0 x 80 | 24400 | – | – |
| UNF No. 1 x 72 | 24401 | – | – |
| UNF No. 2 x 64 | 24402 | – | – |
| UNF No. 3 x 56 | 24403 | – | – |
| UNF No. 4 x 48 | 24404 | – | – |
| UNF No. 5 x 44 | 24405 | – | – |
| UNF No. 6 x 40 | 24406 | – | – |
| UNF No. 8 x 36 | 24408 | – | – |
| UNF No. 10 x 32 | 24410 | – | – |
| UNF No. 10 x 32 LH | 24210 | – | – |
| UNF No. 12 x 28 | 24412 | – | – |
| UNF 1/4 x 28 | 24414 | – | – |
| UNF 1/4 x 28 LH | 24214 | – | – |
| UNF 5/16 x 24 LH | 24216 | – | – |
| UNF 5/16 x 24 | 24416 | – | – |
| UNF 3/8 x 24 | 24418 | – | – |
| UNF 3/8 x 24 LH | 24218 | – | – |
| UNF 7/16 x 20 LH | 24220 | – | – |
| UNF 7/16 x 20 | 24420 | – | – |
| UNF 1/2 x 20 | 24422 | – | – |
| UNF 1/2 x 20 LH | 24222 | – | – |
| UNF 9/16 x 18 LH | 24224 | – | – |
| UNF 9/16 x 18 | 24424 | – | – |
| UNF 5/8 x 18 | 24426 | – | – |
| UNF 5/8 x 18 LH | 24226 | – | – |
| UNF 3/4 x 16 | 24430 | – | – |
| UNF 3/4 x 16 LH | 24230 | – | – |
| UNF 7/8 x 14 | 24434 | – | – |
| UNF 7/8 x 14 LH | 24234 | – | – |
| UNF 1" x 12 LH | 24238 | – | – |
| UNF 1" x 12 | 24438 | – | – |
| UNF 1" x 14 | 24440 | – | – |
| UNF 1.1/8 x 12 | 24442 | – | – |
| UNF 1.1/4 x 12 | 24446 | – | – |
| UNF 1.3/8 x 12 | 24450 | – | – |
| UNF 1.1/2 x 12 | – | 24452 | 24454 |
Round Die BS 1127; 1950 HSS
| Threadnominal size | Article no. | o/d 13/16 | o/d 1 in | o/d 1.5/16 | o/d 1.1/2 | o/d 2 in |
|---|---|---|---|---|---|---|
| UNF No. 4 x 48 | 83004 | – | – | – | – | – |
| UNF No. 5 x 44 | 83005 | – | – | – | – | – |
| UNF No. 6 x 40 | 83006 | – | – | – | – | – |
| UNF No. 8 x 36 | 83008 | – | – | – | – | – |
| UNF No. 10 x 32 | 83010 | – | – | – | – | – |
| UNF No. 12 x 28 | 83012 | – | – | – | – | – |
| UNF 1/4 x 28 | – | 83013 | 83020 | 83030 | – | – |
| UNF 5/16 x 24 | – | – | 83021 | 83031 | – | – |
| UNF 3/8 x 24 | – | – | 83022 | 83032 | 83040 | – |
| UNF 7/16 x 20 | – | – | 83023 | 83033 | 83041 | – |
| UNF 1/2 x 20 | – | – | 83024 | 83034 | 83042 | 83050 |
| UNF 9/16 x 18 | – | – | – | 83035 | 83043 | 83051 |
| UNF 5/8 x 18 | – | – | – | – | 83044 | 83052 |
| UNF 3/4 x 16 | – | – | – | – | 83045 | 83053 |
| UNF 7/8 x 14 | 83054 | – | – | – | – | – |
| UNF 1" x 12 | 83055 | – | – | – | – | – |
| UNF 1" x 14 | 83056 | – | – | – | – | – |
| UNF 1.1/8 x 12 | 83057 | – | – | – | – | – |
| UNF 1.1/4 x 12 | 83059 | – | – | – | – | – |
| UNF 1.3/8 x 12 | 83061 | – | – | – | – | – |
| UNF 1.1/2 x 12 | 83063 | – | – | – | – | – |
