File:Screw Head - Torx Ttap.svg - Wikimedia Commons
Fasteners - BLRS Wiki
Torque screwdriver - Wikipedia
AMPG on Twitter: "These 82° Flat Head Screws with 6-lobe #Torx drive are angled under the head to sit flush within #countersunk holes. https://t.co/6m5wb9SN5x" / Twitter