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Applicable to screw types as indicated by code symbols.
- Type AB thread forming.
- Types B and BP thread forming and Types BF and BT thread cutting.
- Type C thread forming and Types D, F, G, and T thread cutting.
Unit of Measure
Specifications
Product |
N/A Tapping Screws |
Unit of Measure |
N/A English |
Nominal Size or Basic Screw Dia. |
N/A 1/4 in |
Nominal Size or Basic Screw Dia. (Decimal) |
N/A 0.2500 in |
Head Size |
N/A 12 |
| Applicable to Screw Types1 |
N/A
1 3 4 |
Max. Head Dia. (A) |
N/A 0.412 in |
Min. Head Dia. (A) |
N/A 0.380 in |
Ref. Head Side Height (H) |
N/A 0.124 in |
Ref. Head Crown Height (C) |
N/A 0.068 in |
Ref. Total Head Height (O) |
N/A 0.187 in |
Ref. Head Radius (R) |
N/A 0.033 in |
Min. Shoulder Dia. for Other Types Long Screws (E) |
N/A 0.240 in |
- 1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square
