Item #87C400SFC - 7/8-9 X 4 Flat Head Socket Cap Screw ASTM F835 Alloy Therm Black Oxide
Hexagon Socket Flat Countersunk Head Cap Screws [Table 8] (ASTM F835 / F879) ASME B 18.3 - 2012 - China Hexagon Socket Countersunk Head Screws, Countersunk Head Screws | Made-in-China.com