2022_Monster_Bolts_Fasteners_eBay
Bulk item listing for 10,000 new #4-40 9/16" Phillips Flat Head Machine Screws with protective Black Oxide coating. These have an 82° Angle Countersunk Head.

Diameter :
 #4
Thread Size / Count : 40 TPI - UNC Coarse Thread
Length :
 9/16" (includes head)
Drive :
 Phillips #1
Type :
 Flat Head Machine Screw
Matching Nut & Washers:  #4-40 - Available here
System of Measurement :
 Inch
Material :
 Steel w/ Black Oxide Coating
Specifications :
 ASME B18.6.3-2002