| HSHarbor Steel INC | New Castle | — | ● ACTIVE |
Harden Architectural Security Products, LLC | Lancaster | — | ● ACTIVE |
Hards Fabrication & Welding, INC. | Seneca | 20–99 | ● ACTIVE |
| HFHeartland Fabrication LLC | Brownsville | 100–499 | ● ACTIVE |
| HTHighland Tank, LLC (Stoystown, PA) | Stoystown | 100–499 | ● ACTIVE |
Hillock Anodizing, INC. | Philadelphia | — | ● ACTIVE |
Hydro-pac INC | Fairview | 20–99 | ● ACTIVE |
Hygrade Metal Moulding Manufacturing CORP. | Bethlehem | — | ● ACTIVE |
I. Auman Machine Co., INC. | Lebanon | — | ● ACTIVE |
I & I Sling, LLC | Aston | 20–99 | ● ACTIVE |
| ISImperial Systems, INC | Mercer | 100–499 | ● ACTIVE |
Insaco INC | Quakertown | 20–99 | ● ACTIVE |
International Cartridge CORP | Reynoldsville | 20–99 | ● ACTIVE |
J.b. Anderson & Son, INC | Irwin | — | ● ACTIVE |
Jeglinski Group INC | Meadville | — | ● ACTIVE |
Jenkins Machine INC | Bethlehem | 20–99 | ● ACTIVE |
Jersey Chrome Plating Company | Pittsburgh | — | ● ACTIVE |
| JIJlg Industries INC | Mcconnellsburg | — | ● ACTIVE |
| JLJ & L Precision Machine CO INC | Bethlehem | 20–99 | ● ACTIVE |
Jmt Machine Company | Huntingdon Valley | — | ● ACTIVE |
John R. Bromiley Company INC. | Chalfont | — | ● ACTIVE |
Kennametal INC | Latrobe | — | ● ACTIVE |
Keystone Koating LLC | Lititz | 20–99 | ● ACTIVE |
Kingsbury, INC. | Philadelphia | — | ● ACTIVE |
Kiski Precision Industries, LLC | Leechburg | 20–99 | ● ACTIVE |
Kovlar Precision Manufacturing, INC. | Bedford | 20–99 | ● ACTIVE |
Leese & CO INC | Greensburg | — | ● ACTIVE |
| LHLehigh Heavy Forge CORP | Bethlehem | 100–499 | ● ACTIVE |
| LMLeonhardt Manufacturing CO | Hanover | 20–99 | ● ACTIVE |
Levan Machine CO INC | Fleetwood | 20–99 | ● ACTIVE |
Linear Machining Technology LLC | Irwin | — | ● ACTIVE |
Ll Brown INC | Enola | — | ● ACTIVE |
Lzk Manufacturing, INC | Shrewsbury | — | ● ACTIVE |
Majr Products CORP | Saegertown | — | ● ACTIVE |
Mauell CORP | Dillsburg | 20–99 | ● ACTIVE |
M & B Machine, INC. | Carlisle | 20–99 | ● ACTIVE |
Mercer Spring & Wire LLC | Townville | — | ● ACTIVE |
Metplas INC | Natrona Heights | 20–99 | ● ACTIVE |
Mission Critical Solutions, LLC | Alum Bank | 20–99 | ● ACTIVE |
Mitchell Defense LLC | Glenside | — | ● ACTIVE |
| MModineer-pulverman | Dallas | 100–499 | ● ACTIVE |
Nichols Portland, INC. | Saint Marys | — | ● ACTIVE |
| NTNonlethal Technologies, INC. | Homer City | — | ● ACTIVE |
Norcen Industries, INC. | Jersey Shore | 1–19 | ● ACTIVE |
North American Forgemasters CO | New Castle | — | ● ACTIVE |
Novosel Instrument Shop, INC. | Pleasant Gap | — | ● ACTIVE |
Orbel CORP | Easton | — | ● ACTIVE |
Painter Tool Incorporated | Irwin | — | ● ACTIVE |
Pdq Industries, LLC | Lancaster | 100–499 | ● ACTIVE |
Pe Metalworks, INC | New Freedom | — | ● ACTIVE |