| osha.gov | Occupational Safety and Health Administration (OSHA) |
| nwsa.com | National Welding Supply Association |
| aednet.org | Associated Equipment Distributors, Inc |
| ptda.org | Power Transmission Distributors Association |
| ahma.org | American Hardware Manufacturers Association |
| thesefa.com | Southeastern Fastener Association |
| safetycentral.org | Safety Equipment Distributors Association |
| nsc.org | National Safety Council Home & Community Top Page |
| nfda-fastener.org | National Fastener Distributors Association |
| naed.org | National Association of Electrical Distributors |
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