Ask the Expert

Question: Is stacking of F436 washers acceptable with an A325 bolted connection ?  

Answer: Yes, in some cases the stacking of F436 washers seems to be allowed, but not in all cases.

 Read More...

Question: Can I weld to your malleable beveled washers?

Answer: Along with shear plates and round malleable washers, malleable beveled washers are made with ASTM A47 cast malleable iron.

 Read More...

Question: Are washers required to be used with an A325 or A490 structural bolt?

Answer: It is known that the required grade of washer to be used with an A325 or A490 structural bolt is an ASTM F436 hardened washer, however whether or not a washer is required to be used in a given application is often brought into question. The purpose of using a flat washer with a bolt is to provide a smooth bearing surface under the head of the bolt and / or nut.

 Read More...

Question: My plans are calling for a 1″ thick, 5″ outside diameter ASTM F436 plate washer. My local supplier is telling me that F436 washers only come in standard sizes that are much smaller. Are these larger F436 plate washers available?

Answer: Yes. Custom F436 washers can be manufactured to larger sizes per your job’s requirements. Portland Bolt has been involved in many projects where custom F436 washers were specifically called for on a job.

 Read More...