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”.
|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.|
|Element||Grade A||Grade B|
All A307B Bolts are to be used with A563 Grade A Nuts.
All A307B Bolts are to be used with standard F844 Washers (SAE + USS)