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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 |
Type |
N/A Type I Short Screws |
Nominal Size or Basic Screw Dia. |
N/A 5/16 in |
Nominal Size or Basic Screw Dia. (Decimal) |
N/A 0.3125 in |
Head Size |
N/A 1/4 in |
| Applicable to Screw Types1 |
N/A
1 3 4 |
Ref. Recess Dia. (M) |
N/A 0.284 in |
Ref. Recess Depth (T) |
N/A 0.160 in |
Ref. Recess Width (N) |
N/A 0.040 in |
Driver Size |
N/A 3 |
Max. Recess Penetration Gaging Depth |
N/A 0.156 in |
Min. Recess Penetration Gaging Depth |
N/A 0.131 in |
Max. Protrusion Above Gaging Dia. (F) |
N/A 0.129 in |
Min. Protrusion Above Gaging Dia. (F) |
N/A 0.095 in |
Gaging Dia. (G) |
N/A 0.424 in |
- 1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square
