| LHLindberg Heat Treat | Norwood | MA | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| LELLS Enterprises, Corp. | Freetown | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| LSL&m Stress Relieving | Fitchburg | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| LMLockhart Machine CO INC | Tewksbury | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| LWLockheed Window CORP | South Easton | MA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
 L & R Manufacturing Co., INC. | Worcester | MA | Fabricated Metal Product Manufacturing332996 | — | ◇ UNVERIFIED |
 Machining Technologies LLC | Webster | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MIMaher Industries | Easthampton | MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| MMMaplewood Machine | North Dartmouth | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MWMary Wells Junior High School | Southbridge | MA | Fabricated Metal Product Manufacturing332410 | — | ◇ UNVERIFIED |
| MMMass. Machine, INC. | Westwood | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MCMasters CORP | Lowell | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| MSMayhew Steel Product | Shelburne | MA | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| MCMbta Charlestown Non-revenue Automotive Garage | Charlestown | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MFMedway Flower LLC | Medway | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MMMetalcraft Machining | Southbridge | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MIMetalogic Industries LLC | Dudley | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MTMetal Tronics INC. | Haverhill | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| MTMetal Tronics, INC. | Georgetown | MA | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| MTMetal Tronics LLC | Georgetown | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MPMillennium Power Services, Inc. | Westfield | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MSMinuteman Spring LLC | Millbury | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MJM. J. Machine, INC. | Bridgewater | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
 Mjm Manufacturing Solutions INC | Swansea | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MMMonalex Manufacturing, INC. | Douglas | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MEMorse Estate, LLC | Foxboro | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MPMtg Precision Sheet Metal | Pembroke | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| NMN.a. Metal Services INC. | Rockland | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NENew England Bridge Products INC. | Lynn | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NENew England Laser Processing | Danvers | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| NENew England Sandblasting LLC | Middleboro | MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| NENew England Specialty Services, INC. | Norfolk | MA | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| NENew England Stainless Steel Fabrication | Weymouth | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| NENew England Wirecloth Company, INC. | Fitchburg | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NSNGC Sheetmetal And More LLC | Hyde Park | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| NCNitor Corp | Southwick | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| NMNorthbridge Mills LLC | Northbridge | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NMNortheastern Metals, LLC | Greenfield | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| NSNorth Shore Steel Co., INC. | Lynn | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NINu-chrome, Incorporated | Seekonk | MA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| OBOerlikon Balzers Coating USA INC | Agawam | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| OIOmg INC | Agawam | MA | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| OPOptimum Parts Company | Holyoke | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| PAP and J Precision Machine LLC | Chelmsford | MA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| PPParadigm Precision INC - Peabody | Peabody | MA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| PTParamount Tool, LLC | Fall River | MA | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| PCParlee Cycles, Inc. | Beverly | MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| PTPatton Tool Company | Westfield | MA | Fabricated Metal Product Manufacturing332216 | — | ◇ UNVERIFIED |
| PIPegasus, INC. | Holliston | MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| PEPetitpas Enterprises, LLC | New Bedford | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
