Hex head bolts, with UNF thread ANSI B18.2.1
Hexagon bolts U6S imperial thread UNF
d1 | 1/4” | 5/16” | 3/8” | 7/16” | 1/2” | 9/16” | 5/8” | 3/4” | 7/8” | 1” |
---|---|---|---|---|---|---|---|---|---|---|
# threads/inch | 28 | 24 | 24 | 20 | 20 | 18 | 18 | 16 | 14 | 12 |
b | 19 | 22 | 25 | 28 | 32 | 35 | 38 | 44 | 51 | 57 |
e max | 12.8 | 14.7 | 16.5 | 18.3 | 22 | 23.8 | 27.5 | 33 | 38.5 | 44 |
k | 4 | 5.2 | 6 | 7.1 | 7.9 | 9.1 | 9.9 | 11.9 | 13.9 | 15.5 |
s " | 7/16” | 1/2” | 9/16” | 5/8” | 3/4” | 13/16” | 15/16” | 1 1/8” | 1 5/16” | 1 1/2” |
s mm | 11.1 | 12.7 | 14.3 | 15.9 | 19 | 20.6 | 23.8 | 28.6 | 33.3 | 38.1 |