Hillman Round Head Machine Screw, 8-32 x 3/4 In. is designed to securely fasten metal parts together, either by using nuts or by screwing directly into a threaded receptacle. The length of the fastener is measured from the underside of the head to the tip of the screw, ensuring precise fit for your project needs. For optimal performance, if nuts are required, it is to use ones with the same finish and threading to a proper and secure fit. This machine screw combines reliability and ease of use for various metal fastening applications. Model Number: