CRL Self-Tapping Machine Screws have special cross-cuts which allow them to tap their own threads in metal. They attach thin materials to substrates with pre-drilled holes, as with storm and screen window clips being attached to aluminum window frames. Quantities of 100 are packed in plastic re-sealable tubs, and bulk packages of 1,000 are packaged in poly bags. Both feature easy-to-read labels in see through packaging.

Most shipping weights are approximate and have not been verified. If the exact weight is needed in order to determine shipping costs, and shipping costs are required in order for you to complete your order, please request this prior to submitting your order by contacting CRL Customer Service. Product images shown are of the actual product or a close representation. ColorsColours can vary depending on your computer's video card and on how your monitor's colorcolour is adjusted.