SAE AS 155901 thru AS 156200A

SAE AS 155901 thru AS 156200A Stud, Stepped, 2 Dia Engagement, Cadmium Plated, Steel UNS G87400, .5000-13 UNS X .4375-20 UNF-3A ( Reaffirmed: May 2005 )

standard by SAE International, 02/01/2007