Socket head cap screws 8/32 thread, 9/64 Allen wrench drive. Package contains enough screws for one machine re-build: 4 - 1/2 (for coils and binding posts), 2 - 1/4 (for a-bar and spring shelf, 1 - 1 (for tube vice), 1 - 8/32 cast iron wing nut (for tube vice), 1 - 9/64 Allen wrench (fits all screws included)