Hillman Round Head Machine Screw, 6-32 x 1-1/2 In. are designed to securely fasten metal parts together, either by using nuts or by screwing directly into a threaded receptacle. The length of the screw is measured from the underside of the head to the tip, ensuring accurate sizing for your fastening needs. For optimal performance, it is to pair these screws with nuts that have the same finish and threading to a proper fit and strong hold. These machine screws provide reliable fastening solutions for a variety of metalworking applications. Model Number: