Nominal Size: #8-40 x 1/4"
Head Diameter: 0.2355"
Head Height: 0.1040"
Threaded Length: 0.2415"
Overall Length: 0.3455"
Material: Hardened Steel
Finish: Black Oxide
Head Style: Weaver Oval (Slotted)
Thread Size: 40 (Fine)
Thread Length: Full
Type: Gun Screw

Bag of 10.

Firearm and Scope screws by type: