The “X” designates the connection type (bearing-type connection with threads excluded from the shear plane) and has nothing to do with the bolt itself. Therefore, an A325 structural bolt used in this type of connection will have no different markings than an A325 bolt used in a different type of connection (N or SC). All A325 type 1 bolts are simply marked with “A325” and the manufacturer’s logo. The exceptions are as follows:
| A325 type 3 weathering steel bolts are underlined (A325). |  |
| Fully threaded A325 structural bolts are designated with a “T” (A325T). |  |
Hello,
I have connection situation as beam to beam with shear plate connection. Shear plate has short slotted holes and beam web has std size holes. Bolt type is A325X. How many washers required per bolt?
@Sridher- I am sorry, but we are not able to help. I believe the AISC has guidelines for when and where washers are required.