Standards, Codes, and Regulations
Mechanical Engineering

Air Conditioning & Refrigeration Institute Standards

American National Standards Institute

American Petroleum Institute Technical Standards

ASME Codes & Standards

American Society for Testing and Materials

Code of Federal Regulations
Once a bill becomes law, regulations are promulgated to put the law into action.  All U.S. regs can be found here.

Consumer Product Safety Commission

Federal Register
The best way to stay abreast of new regulations that have not been codified in the CFR.   Also serves to notify of proposed regulations.

National Institute of Standards and Technology

Society of Automotive Engineers Standard Development & Research

United States Code
Search the public laws of the U.S.

Washington Administrative Code
State of Washington