SAE AS 3418

SAE AS 3418 Bolt, Machine, Double Hexagon Extended Washer Head, Close Tolerance Shank, AMS 5662, .250-28UNJF-3A (Stress Rupture Resistant) ( Reaffirmed: Nov 1991 Dec 1991 May 1995 Sep 2001 May 2006 )

standard by SAE International, 12/01/1985