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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 |
| Applicable to Screw Types1 |
N/A
1 3 4 |
Max. Width Across Flats (A) |
N/A 0.375 in |
Min. Width Across Flats (A) |
N/A 0.367 in |
Min. Width Across Corners (W) |
N/A 0.409 in |
Max. Head Height (H) |
N/A 0.190 in |
Min. Head Height (H) |
N/A 0.172 in |
Max. Washer Dia. (B) |
N/A 0.520 in |
Min. Washer Dia. (B) |
N/A 0.480 in |
Max. Washer Thickness (U) |
N/A 0.050 in |
Min. Washer Thickness (U) |
N/A 0.030 in |
Min. Protrusion Beyond Gaging Ring (F) |
N/A 0.103 in |
- 1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square
