Application:
A307B Bolts are commonly used for flange joints in piping systems with cast iron flanges. A307B Bolts have a tensile strength range of 60-100 KSI. These are very similar to A307 Grade A, only the head dimensions are different; A307A uses a standard Hex head where as the A307B Bolts use a Heavy hex head. This spec ranges in diameters of ¼” – 4”.
A307B Bolts
Grades
| A | Headed bolts, threaded rods and bent bolts intended for general applications. |
|---|---|
| B | Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. |
| C | Nonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement. |
Chemical Properties
| Element | Grade A | Grade B |
|---|---|---|
| Carbon, max | 0.29% | 0.29% |
| Manganese, max | 1.20% | 1.20% |
| Phosphorus, max | 0.04% | 0.04% |
| Sulfur, max | 0.15% | 0.05% |
Recommended Nuts
All A307B Bolts are to be used with A563 Grade A Nuts.
Recommended Washers
All A307B Bolts are to be used with standard F844 Washers (SAE + USS)
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