The ASME B18.6.4 standard is a critical technical document established by the American Society of Mechanical Engineers (ASME) that provides comprehensive dimensional and general data for tapping screws and metallic drive screws. Purpose and Scope
The primary function of ASME B18.6.4 is to standardise the design and manufacturing requirements for thread-forming and thread-cutting tapping screws. These fasteners are unique because they eliminate the need for pre-tapped holes, creating their own mating threads as they are driven into materials like metal, plastic, or wood.
Fastener Types: Includes slotted and recessed head tapping screws, as well as metallic drive screws recognized as "American National Standard". asme b1864 pdf
Measurement: This standard specifically covers the Inch Series.
Materials: Specifies requirements for materials such as steel (often quenched and tempered) and various grades of stainless steel, such as AISI 410. Technical Specifications The ASME B18
The standard acts as a technical blueprint, detailing everything from head geometry to performance testing. ANSI B18.6.4 Self Tapping Self Drilling Screws
ASME B18.6.4 is the recognized American National Standard that covers the dimensional and general data for the most commonly used machine screws, tapping screws, and metallic drive screws. Published by the American Society of Mechanical Engineers (ASME), this standard is essential for mechanical engineers, manufacturers, and quality control inspectors to ensure interchangeability and proper fit in threaded fastener applications. Three Legal Ways to Get the PDF You
Once you have identified the correct standard (e.g., ASME B16.9 instead of the phantom B1864), you need to acquire the PDF legitimately.
When referencing the standard, engineers look for specific tables included in the document:
Authorized resellers like Techstreet (now part of Clarivate) sell ASME standards in PDF format with identical pricing and legality.