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Applicable to screw types as indicated by code symbols.
This type of recess has a large center opening, wide straight wings, and blunt bottom, with all edges relieved or rounded.
- Type A thread forming, except for short lengths.
This type of recess has a large center opening, wide straight wings, and blunt bottom, with all edges relieved or rounded.
Unit of Measure
Specifications
Product |
N/A Tapping Screws |
Unit of Measure |
N/A English |
Type |
N/A Type IA |
Nominal Size or Basic Screw Dia. |
N/A No. 20 |
Nominal Size or Basic Screw Dia. (Decimal) |
N/A 0.3200 in |
| Applicable to Screw Types1 |
N/A
2 |
Ref. Recess Dia. (M) |
N/A 0.394 in |
Ref. Recess Depth (T) |
N/A 0.242 in |
Ref. Recess Width (N) |
N/A 0.086 in |
Driver Size |
N/A 4 |
Max. Recess Penetration Gaging Depth |
N/A 0.225 in |
Min. Recess Penetration Gaging Depth |
N/A 0.207 in |
- 1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square
