They are frequently used in machinery and appliances.
Machine Screw, Round, Phil/Sltd Comb Drive #12-24 X 5/8in 18-8 Stainless Steel 25PK Size: #12-24 X 5/8 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.