material cres astm a564; 1.875 in nom o/a dia; 1.500 in major i.d.; 0.340 in minor i.d.; drilled hole in face 0.248 in dia by 0.380 in deep for dowel pin general characteristics item description, zzzy criticality code justification, material will be in accordance with ships parts control center activity hx quality control,manufacturing and testing specifications reference number differentiating characteristics