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i have the answer finally, they are SAE J-429 or equivalent A307 Gr.B. aparently the mark is for only the manufacturer @miningman yeh thats why they are in no conformance but the contractor insists on using it because he already made his purchase. we are the end customer thx guys for his time

the project is in mexico but we have supplies from every wehere, yeah i know when they are 307 or 325 have mark , and the certificate are fake ASF

hi everyone recently my boss give to me a NCR from other person and the reason is because they do not know what kind of bolt are they using, in the picture attach see the bolt, But in my experiencie i had neever seen that nomenclature, i dont know it is equivalent to A325 or A307. anyone here...

hello everyone i am new here and this is my first topic i'm a QC supervisor and we have a problem with some saddle support for a heat recuperator duct with 4100 mm Diameter, the main problem is the saddle are no in 100% contact with the duct , they have a gap like 5-7 mm, in a 70% of the saddle...