ASTM A-563 Grade DH nuts

[JC]

I have been told that there is a shortage of <font color=red>ASTM A-563, Grade DH</font> nuts.&nbsp;&nbsp;Does anyone know if this is true or not?

 

[ghillis]

It depends on who's calling them out and how particular (anal retentive) they are.&nbsp;&nbsp;According to A563, A194 Grade 2H is acceptable substitute when properly marked to A194.&nbsp;&nbsp;When zinc coated, the overtapping, lubrication and rotational capacity shall be tested to A563.&nbsp;&nbsp;If they aren't coated, I would see little trouble in showing a QA type that the requirement is met with the much more common A194 Gr 2H if there is any difficulty finding the fasteners marked to A563.&nbsp;&nbsp;If you need them marked to A563, then you should look for a fastener manufacturer such as Cardinal in Las Vegas, Nevada who can make (mark) them legitimately.

 

[JC]

ghillis:<br><br>Thanks for the information.&nbsp;&nbsp;However, I thought that Cardinal Fasteners was out of Ohio.&nbsp;&nbsp;Is that true?<br><br>JC

 

[ghillis]

Sorry, The company I meant changed its name a while back, it is now Accutech (702)739-1966.&nbsp;&nbsp;They deal with the Nuclear industry, so they are, presumably, very reputable but may be a bit higher than others.<br><br>