Applicable to screw types as indicated by code symbols.
This type of recess consists of two intersecting slots with parallel sides converging to a slightly truncated apex at bottom of recess.
- Types B and BP thread forming and Types BF and BT thread cutting.
This type of recess consists of two intersecting slots with parallel sides converging to a slightly truncated apex at bottom of recess.
                    Unit of Measure
                    
               
        
            Specifications
| Product | N/A Tapping Screws | 
| Unit of Measure | N/A English | 
| Type | N/A Type II | 
| Nominal Size or Basic Screw Dia. | N/A 7/16 in | 
| Nominal Size or Basic Screw Dia. (Decimal) | N/A 0.4375 in | 
| Applicable to Screw Types1 | N/A
                                                                                          3 | 
| Ref. Recess Dia. (M) | N/A 0.498 in | 
| Ref. Recess Depth (T) | N/A 0.295 in | 
| Ref. Recess Width (N) | N/A 0.083 in | 
| Driver Size | N/A Point Same on all Drivers | 
| Max. Recess Penetration Gaging Depth | N/A 0.296 in | 
| Min. Recess Penetration Gaging Depth | N/A 0.273 in | 
- 1 1 = Circle, 3 = Triangle, 4 = Square
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