| 15320 | Macadam of roughly graded crushed stones, pebbles, gravel, or slag, dross or similar industrial wastes, or intermixtures of these materials, whether or not tarred | |
| 64339 | Macadam, tarred, transportation of, by road in specialized vehicles | |
| 23720 | Macaroni, cooked, ready for consumption after heating, whether or not mixed with tomato sauce | |
| 23710 | Macaroni, not cooked or otherwise prepared | |
| 23720 | Macaroni, partially or completely cooked, whether or not dehydrated | |
| 01620 | Mace, whether or not crushed or ground | |
| 43911 | Macerating vessels, brewing, incorporating thermal equipment | |
| 42921 | Machetes | |
| 85123 | Machine operators, supplying of, for work assignments | |
| 83569 | Machine parts, magnetic testing of | |
| 83569 | Machine parts, radiographic testing of | |
| 83569 | Machine parts, ultrasonic testing of | |
| 44221 | Machine tools for cold-working glass (excl. sand-jet engraving machines) | |
| 44211 | Machine tools for working by electron beam processes | |
| 44211 | Machine tools for working by ionic beam processes | |
| 44211 | Machine tools for working by plasma-arc processes | |
| 73129 | Machine tools, rental or leasing of, without operator | |
| 44211 | Machine tools, ultrasonic, for shaping minerals | |
| 44211 | Machine tools, ultrasonic, for working diamond or metal carbide dies | |
| 44251 | Machine vices, fixed, revolving or adjustable | |
| 44720 | Machine-guns | |
| 44720 | Machine-pistols, military | |
| 88239 | Machinery and equipment manufacturing services, other | |
| 87320 | Machinery and equipment n.e.c., installation of | |
| 87159 | Machinery and equipment n.e.c., maintenance and repair of | |
| 71334 | Machinery insurance policies, underwriting of | |
| 62389 | Machinery n.e.c., other, mail order retail trade services of | |
| 62189 | Machinery n.e.c., other, non-specialized store retail trade services of | |
| 62489 | Machinery n.e.c., other, other non-store retail trade services of | |
| 62589 | Machinery n.e.c., other, retail trade services of, on a fee or contract basis | |
| 62289 | Machinery n.e.c., other, specialized store retail trade services of | |
| 61189 | Machinery n.e.c., other, wholesale trade services of, except on a fee or contract basis | |
| 61289 | Machinery n.e.c., other, wholesale trade services of, on a fee or contract basis | |
| 73129 | Machinery n.e.c., rental or leasing of, without operator | |
| 27998 | Machinery parts of textile fabrics (excl. belts and belting, hose-piping and similar tubing, wicks and gas mantles) | |
| 83812 | Machinery, photographing of | |
| 44180 | Machinery, poultry-keeping, non-industrial | |
| 81130 | Machinery, research and experimental development concerning | |
| 44630 | Machines (excl. sewing-machines) for making or repairing leather footwear | |
| 44211 | Machines for cutting metal or other hard materials, operated by light or photon beam processes | |