| MTMerrill Tool & Water Jet, LLC | Merrill | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MPMeschkat Precision Machining, INC. | Santa Clarita | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MPMetaltech Products INC. | Lebanon | MO | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MWMetal Works Precision Machine & Tool INC. | Tucson | AZ | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MIMetlfab INC | Frederick | MD | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| MMMetric Manufacturing CO INC | Lowell | MI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MDMetro Design INC | Elyria | OH | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MEMeyer Enterprises | Denton | TX | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MIMicrophoto Inc- Roseville | Roseville | MI | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MPMicro Precision Machining, INC. | Campbell | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MTMicro Tool Company, INC. | Bethlehem | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MMMidstate Manufacturing Company | Galesburg | IL | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| MFMidwest Fasteners, INC | Miamisburg | OH | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MMMikes Micro Parts INC | South El Monte | CA | Fabricated Metal Product Manufacturing332214 | 1-19 | ◐ LIKELY ACTIVE |
| MMMiller Machine & Tool Company | Winchester | VA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| MMMingo Manufacturing | Owasso | OK | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MGMinnesota Grinding INC | Crystal | MN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MCMitsubishi Chemical Advanced Materials IL | Libertyville | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
Modern Machine Shop, INC. | Laredo | TX | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MMModern-Tec Manufacturing, Inc. | Lockport | NY | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
Modus Advanced, INC. | Livermore | CA | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| MMMonroe Machined Products, INC. | Seatac | WA | Chemical Manufacturing325181 | — | ◐ LIKELY ACTIVE |
| MCMoody Corporation | Zelienople | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MCMorris Coupling Company | Erie | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| MAM.s. Action Machining CORP | Mchenry | IL | Primary Metal Manufacturing331110 | 20-99 | ◐ LIKELY ACTIVE |
| MPMultimetal Products Corporation | Gurnee | IL | Fabricated Metal Product Manufacturing332322 | 20-99 | ◐ LIKELY ACTIVE |
| NENatoli Engineering | St Charles | MO | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NMNelson Machine and Welding Corporation | Green Bay | WI | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| NMNemad Manufacturing CO | Harbor City | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NLNeodora LLC | San Jose | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NTNeosho Trompler Inc | Hartland | WI | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NPNevron Plastics, INC. | Saugus | MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NMNjc Machine, LLC | Croydon | NH | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NNNo Name Precision, LLC | San Jose | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NENorth East Machine & Tool CO | Janesville | IA | Fabricated Metal Product Manufacturing332313 | 20-99 | ◐ LIKELY ACTIVE |
| NSNorthland Screw Products, Inc. | Saint Francis | MN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NMNorthwestern Mfg | Lake City | PA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NMNorthwest Machine INC | Coeur D Alene | ID | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| NPNovo Precision, LLC | Bristol | CT | Fabricated Metal Product Manufacturing332618 | 20-99 | ◐ LIKELY ACTIVE |
| NCNst Corporation | Lafayette | LA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| NINtm INC | Fridley | MN | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| NMNxedge Mh LLC | Morgan Hill | CA | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| OMOperose Manufacturing, INC | Frederick | CO | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| OCOSH Cut | Spanish Fork | UT | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| PAPankl Aerospace Systems | Cerritos | CA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| PPPanther Precision Machine INC | Anoka | MN | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
Paragon Manufacturing | Westfield | MA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| PVParallel Ventures, INC. | Tucson | AZ | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| PMPaul's Machine and Welding Corp | Villa Grove | IL | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| PEPayne Engineering & Fabrication Co., INC. | Canton | MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |