B5/8-11X4 1/2 MS90728 Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR (Pack Qty 50) BC-BH063C450N

PICTURES ARE REPRESENTATIVE OF ITEM BUT ARE NOT OF THE ACTUAL ITEM. Product dimensions finish head markings thread length stamping shape or forging shape etc. may differ from picture. Products are guaranteed to meet the specifications to which they are manufactured. Specifications allow for tolerances in dimension and shape which can vary from lot to lot. Used when a flush mounting high strength screw is required. Commonly used in tools and dies where moving parts pass over the fastened area.