Socket Set Screw, Cup, 1/4 in Overall Length, 10-24, Alloy Steel, Black Oxide, PK 100/ THREAD CLASS: 3A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.250 INCHES NOMINAL HEAD STYLE: C101 HEADLESS (SETSCREW) INTERNAL DRIVE STYLE: D5 HEXAGON NOMINAL THREAD DIAMETER: 0.190 INCHES WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL THREAD QUANTITY PER INCH: 24 MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNC