Head types
1. hexagon head
2. hexagon head with flange
3. square head
4. T head (hammer head)
5. mushroom head(truss head)
6. cheese head
7. round head
8. pan head
9. countersunk head (flat head)
10. raised countersunk head (oval)
eg:
1. GB818 Cross recessed pan head Combination screws
2. GB818 Cross recessed pan head screws
3. GB67 Cross recessed truss head screw
4. GB867 Cross recessed truss head triangular screw
5. GB819 Cross recessed countersunk head screw
6. GB819 Cross recessed countersunk head triangular screw
7. Cross recessed countersunk head tapping screws
8. Cross recessed countersunk head
9. ross recessed truss head screw
10. hexagon head triangular screw
11. cross recessed round head screw
12. thumb screw
13. Collated screw