Hillman Round Head Machine Screw, 10-24 x 1 In. are designed to fasten metal parts securely, either by using nuts or by screwing directly into a threaded receptacle. These machine screws are measured from the underside of the head to the tip to ensure the correct fastener length is selected for your project. For optimal performance, it is to use nuts that match the screw’s finish and threading, ensuring a proper and secure fit every time. Model Number: