Slot
Cross recess
6-Lobe
Hex chamfered single face
Hex with hole
Hex with shoulder
Hex chamfered double faces
Nylon Insert
Hole on shank
Straight-knurl
Reduced shank
Normal shank
Increased shank
Shoulder
Waisted shank
Full thread
Flat point
Cone point
Dog point
Semitubular end
UNI 5737-1977
Metric hexagon head bolts
UNI 5712
Hexagon bolts with large width across flats for high strength structural bolting
UNI 5738
Hexagon head bolts with fine pitch thread
