These are black oxide coated steel oval head screws with Phillips drive. These are commonly used for TLMAB replacements and for upgrades to holster and sheath mounts. These are heavy duty and are hard to find.
Specifications
Length = .750 (from under head surface)
Head Diameter = .300
Phillips Drive
Black Oxide Coated
Sold Individually
(1) QTY = (1) Screw