229 Countersunk - end open
329 Countersunk head - open
429 Flat head - end closed
529 Countersund head - end closed
629 Countersunk head - end closed
TCCH Flat head - end closed - hexagonal body
TCFH Mild Steel - Countersunk head - end closed - hexagonal body
TCTF - Mild Steel - Countersund head - open end - hexagonal body
TCAH - Aluminium - Flat head - end open
TCAF - Aluminium - Countersunk head - end open
1329 Countersunk head - round body
2129 Big Flat head - with knurls, round body
1729 Flat head - hexagonal body