HEXAGONAL BOLTS AND NUT
PROPORTIONS FOR HEXAGONAL BOLTS
From Design Data Book
Assuming Diameter (d) = 24 mm
Size across flat (S) = 1.25d+6 mm
Size across corner (e) = 1.155×S
Height of the nut (h) = 0.8 d to d
Angle =30°
The length of threaded part
Height (h) = 0.75 d to 0.8 d
length (l) = 2d+5 mm, for bolt up to and including.
length (l) = 2d+10mm, for bolts length above 80 mm and up to 200 mm.
length (l) = 2d+20 mm, for lengths above 200 mm.
V - THREAD WITH FLAT CREST AND ROOT
Hexagonal bolt thread part (v- thread with flat crest and root)
Pitch (P) = 3 mm
Height (H) = 3 mm
PROPORTIONS FOR HEXAGONAL NUT
Assuming Diameter (d) = 24 mm
Size across flat (S) = 1.25d+6 mm
Size across corner (e) = 1.155×S
Height of the nut (h) = 0.8 d to d
Angle =30°
PROPORTIONS FOR SQUARE NUT
Size across the flat (s)
= 1.5 d +3 mm
Size
across the corner e = √2 ×s
Height of the nut h =
0.8 d to d
Angle = 30°
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