DIN7985, DIN84
The square drive is introduced as Type III in IFI 7th. Also, introduced are combined drive systems reflecting the expressed needs of users. IFI recommends that when selecting a head style for machine screws, the first design consideration be given to following five head styles:
- Flat Countersunk
- Oval Countersunk
- Pan
- Hex
- Hex Washer

Machine Screws
Thread Cutting Screws. Types 1, 23 & F |
UNC-Coarse |
UNF-Fine |
Size-TP1 |
Size-TP1 |
1-64
2-56
3-48
4-40
5-40
6-32
8-32
0-24
10-24
12-24
1/4-20
5/16-18
3/8-16
7/16-14
1/2-14
9/16-12
5/8-11
3/4-10
7/8-9
1-8 |
0-80
1-72
2-64
3-56
4-48
5-44
6-40
8-36
10-32
12-28
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
9/16-18
5/8-18
3/4-16
7/8-14
1-14 |
Slotted Fillister Head

Slotted Binding Head

Cross Recessed Indented And Non-Indented Hex Head Machine Screws

Cross Recessed Type I Indented Hex Washer Head Machine Screws

Cross Recessed Type I Round Washer Head Machine Screws

DIN Spec.
| DIN84 |
DIN 85 |
DIN 963 |
DIN 964 |
| DIN EN ISO 1207 |
DIN EN ISO 1580 |
DIN EN ISO 2009 |
DIN EN ISO 2010 |
| DIN7985 |
DIN 965 |
DIN 966 |
ISO 7048 |
| DIN EN ISO 7045 |
DIN EN ISO 7046-1 & 2 |
DIN EN ISO 7047 |
DIN EN SIO 7048 |
|