Machine Screw, Round, Phil/Sltd Comb Drive #12-24 X 1in 18-8 Stainless Steel 100PK Size: #12-24 X 1 inchRound Head, Phillips/Slotted Combination DriveUse with nuts or pre-threaded holes of the same diameter & thread sizeOften used in machinery & appliancesNuts and washers not includedThread Type: Coarse, Thread Class: UNC-2A, Point Style: BluntSpecification(s) Met: ASME B18.3 & ASME B1.1 Machine screws have a uniform diameter along their entire length and are designed to screw into threaded holes or to be used in combination with machine screw hex nuts..