The Hillman Group 90197 8-32-Inch x 1-1/2-Inch Round Head Combo Machine Screw, Product Description Machine screws are used with nuts or screwed directly into a threaded receptacle to fasten metal parts together. Measured from the underside of the head to the tip of the screw to obtain fastener length. If nuts are needed, use with nuts of the same finish and threading for proper fit. From the Manufacturer Machine screws are used with nuts or screwed directly into a threaded receptacle to fasten metal parts together. Measured from the underside of the head to the tip of the screw to obtain fastener length. If nuts are needed, use with nuts of the same finish and threading for proper fit. Features Use to fasten metal parts together Zinc finish for moderate corrosion protection Fasten with screwdriver to reduce risk of over-tightening If nuts are needed, use with nuts of the same finish and threading Stronger thread than wood screws, made finer and more precisely USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.