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Round Domed Head Carriage Bolts A307 Gr. A (Grade 2) Low Carbon Steel. A square neck under the head keeps the bolt from turning in the material when tightening a nut. The smooth, large diameter rounded head provides a finished appearance. Length is measured from underneath the head. The bright zinc plated finish helps resist normal atmospheric corrosion.
| Manufacturer | KL Jack Quality Vendor |
|---|---|
| Item Type | Carriage Bolt |
| System of Measurement | Inch |
| Diameter | 5/16" |
| Length (inches) | 2" |
| Depth of Square | 0.187" max / 0.156" min |
| Finish | Zinc Plated |
| Grade | 2 |
| Head Diameter | 0.719" max / 0.688" min |
| Head Height | 0.176" max / 0.156" min |
| Head Style | Round |
| Material | Steel |
| Dimensional Specification | ASME B18.5 |
| Finish Specification | ASTM F1941 Fe/Zn |
| Material Specification | A307 Grade A |
| Thread Specification | ASME B1.1, UNC, Class 2A |
| Tensile Strength | 60,000 PSI |
| Threads Per Inch | 18 |
| Thread Type | Coarse |
| Width of Square | 0.325" max / 0.307" min |
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