Product Description
| Head type (Alternate name) |
Countersunk (Flat) |
| Size | 5/16 BSW |
| Shank diameter, nominal | 5/16" |
| Pitch | 18 tpi |
| Length (measured from the top of the head) |
1" |
| Drive | Slot |
| Material | Steel |
| Finish | Zinc plated |
| Head diameter | 0.547" / 0.518" |
| Head angle | 90 degrees |
| Package quantity | One |
| Standard | BS450:1958 |
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