ASME B18.6.4 is a standard developed by the American Society of Mechanical Engineers (ASME) that covers general and dimensional data for various types of slotted and recessed head tapping screws and metallic drive screws. Key Technical Details
Scope: Provides complete general and dimensional data for thread-forming and thread-cutting tapping screws and metallic drive screws recognized as "American National Standard". Screw Types Covered:
Self-Tapping & Self-Drilling: Includes screws like "TEK" screws which function as a drill bit.
Thread-Rolling: Specifically designed for use in plastic to deform material rather than cut it.
Metallic Drive (Type U): Blunt-point screws designed to be hammered into pre-drilled holes, often used for tamper resistance.
Sheet Metal Screws: Sharp-pointed screws with coarse threads for pre-drilled sheet metal.
Head Styles: Covers various configurations including flat countersunk (82 and 100 degrees), oval countersunk, pan, fillister, and hex heads.
Consolidation Note: The B18.6.4-1998 (R2005) standard was consolidated in February 2013 into ASME B18.6.3, which now includes machine screws, tapping screws, and metallic drive screws. Helpful Reports & Resources ASME B18.6.4 Tapping Screws Standard | PDF - Scribd
The ASME B18.6.4 standard, officially titled "Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (Inch Series)," is a critical technical document for the manufacturing and engineering of mechanical fasteners. While originally a standalone document, parts of this standard were consolidated into ASME B18.6.3 in 2013 to streamline requirements for machine and tapping screws. Scope and Purpose
The standard provides comprehensive general and dimensional data for various styles of slotted and recessed head tapping screws, as well as metallic drive screws. Its primary goal is to ensure interchangeability and performance across different manufacturers for products used in automotive, aerospace, and general industrial assembly. Key areas covered in the ASME B18.6.4 PDF include:
Dimensional Tables: Detailed measurements for head diameters, heights, and slot/recess dimensions.
Thread Design: Specifications for thread-forming and thread-cutting points, ensuring the screw can create its own mating threads in materials like metal, plastic, or wood.
Head Types: Covers standard designs such as flat countersunk, oval countersunk, pan, fillister, hex, and hex washer heads.
Material and Hardness: Requirements for steel and stainless steel variants, including heat treatment processes to achieve necessary surface hardness (e.g., Rockwell C45 minimum). ASME B18.6.4 Tapping Screws Standard | PDF - Scribd
Introduction
ASME B18.64 is a standard published by the American Society of Mechanical Engineers (ASME) that provides specifications for the design, materials, and testing of socket weld fittings. The standard is titled "Socket Weld Fittings" and is commonly referred to as ASME B18.64.
Overview of ASME B18.64
ASME B18.64 provides detailed requirements for socket weld fittings, including:
Scope of ASME B18.64
The scope of ASME B18.64 includes:
Key Features of ASME B18.64
Some key features of ASME B18.64 include:
Importance of ASME B18.64
ASME B18.64 is an important standard for several reasons:
ASME B18.64 PDF
The ASME B18.64 standard is available for download in PDF format from the ASME website or other online sources. The PDF version of the standard provides detailed information on the design, materials, testing, and inspection requirements for socket weld fittings.
Contents of ASME B18.64 PDF
The ASME B18.64 PDF typically includes:
Uses of ASME B18.64 PDF
The ASME B18.64 PDF is used by:
Conclusion
ASME B18.64 is a critical standard for socket weld fittings used in industrial piping systems. The standard provides detailed requirements for design, materials, testing, and inspection, ensuring that socket weld fittings are safe, reliable, and perform efficiently. The ASME B18.64 PDF is a valuable resource for designers, manufacturers, inspectors, and purchasers of socket weld fittings.
The ASME B18.6.4 standard is an American National Standard that provides general and dimensional data for thread-forming and thread-cutting tapping screws metallic drive screws in the inch series. The American Society of Mechanical Engineers - ASME
Originally issued as a separate standard, B18.6.4-1998 (reaffirmed in 2005) was consolidated into ASME B18.6.3
in 2013, which now covers machine screws alongside tapping and drive screws. The American Society of Mechanical Engineers - ASME Scope and Technical Contents
The standard specifies requirements for several fastener types designed to create their own threads in metal, wood, or plastic. Key technical areas include: Fasteners Clearing House Fastener Types Thread-Forming Screws
: Displace material to form a thread (e.g., Types A, AB, B). Thread-Cutting Screws
: Remove material to cut a thread (e.g., Types 1, 23, 25, F). Metallic Drive Screws (Type U)
: Unslotted screws hammered into pre-drilled holes, often for tamper resistance or masonry. Head Configurations asme b1864 pdf
: Covers flat countersunk (82° and 100°), oval, pan, fillister, hex, and truss heads. Some styles, like the Truss Head
, are noted as "not recommended for new designs" due to inherent weakness. Drive Systems
: Dimensions for slotted and recessed drives, including Phillips (Type I), Frearson (Type IA), and Square (Type III) recesses. Appendices : Provide critical engineering data such as: Approximate hole sizes for various materials. Instructions for protrusion and wobble gaging. Formulas used to derive the dimensional tables. The American Society of Mechanical Engineers - ASME Material and Performance Specifications : Commonly manufactured from (quenched and tempered to specific hardness), 300-series stainless steel
(for corrosion resistance), and occasionally brass or nylon. Heat Treatment
: Screws must typically be quenched and then tempered at a minimum of
for at least one hour to reach required tensile and yield properties.
: Available in various coatings including zinc (clear, yellow, black), black oxide, cadmium, and multi-layer ceramic topcoats like Accessing the Standard As a copyrighted document from the American Society of Mechanical Engineers (ASME)
, the full PDF is generally a paid resource. You can find official copies or authorized abstracts through: Open Access - ASME
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".
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 standard acts as a technical blueprint, detailing everything from head geometry to performance testing. ANSI B18.6.4 Self Tapping Self Drilling Screws
The standard ASME B18.6.4 , which covers "Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (Inch Series)," was withdrawn on February 5, 2013 . It has been largely consolidated into ASME B18.6.3 Quick Facts: ASME B18.6.4 Original Scope
: Comprehensive dimensional and general data for slotted and recessed head tapping screws and metallic drive screws. Key Contents
: Includes specifications for head types (pan, flat, oval, etc.), thread-forming data, and protrusion/penetration gaging. Current Status
: Superseded and inactive. Most of its content is now found in ASME B18.6.3 Where to Access or Purchase the PDF
While the standard is legacy, digital copies are still used for historical reference or specific contract requirements: Official Sources ANSI Webstore Intertek Inform provide official PDF versions for purchase. Reference Platforms ASME B18
: Limited abstracts and older versions are often hosted on platforms like Hardware Suppliers
: For actual hardware compliant with these specs, retailers like McMaster-Carr FCH Sourcing Network list products still manufactured to B18.6.4 dimensions. Screw Types Covered
The standard typically categorized screws into several functional types: ASME B18.6.4 : 1998 - Intertek Inform
The ASME B18.6.4 standard is the primary American National Standard governing the design and dimensional requirements for thread-forming and thread-cutting tapping screws and metallic drive screws (inch series).
Whether you are looking for an ASME B18.6.4 PDF for engineering design or manufacturing, understanding its scope and technical specifications is essential for ensuring fastener reliability and compatibility. Scope and Purpose
The standard provides a comprehensive set of general and dimensional data for various fastener types recognized in the United States. It covers:
Dimensional data: Detailed tables for diameters, lengths, and head proportions.
Gaging instructions: Methods for checking protrusion of countersunk heads, hex head corners, and recess penetration/wobble.
Standardized terminology: Definitions for grip length, body length, and thread types to ensure clear communication between designers and manufacturers. Major Screw Types and Classifications
The ASME B18.6.4 standard categorizes tapping screws based on how they interact with the material: ANSI B18.6.4 Self Tapping Drive Screws (Type U)
, a technical standard that defines the very DNA of tapping screws and metallic drive screws. While a PDF of this standard might look like a dry collection of tables and dimensions, it is actually a vital blueprint for the reliability of the modern world. The Language of Precision Standards like ASME B18.6.4
were born out of industrial chaos. Before the 20th century, a screw made in one factory might not fit a hole drilled in another, leading to catastrophic mechanical failures and slowed production. The American Society of Mechanical Engineers (ASME) solved this by creating a "common language" for hardware. The B18.6.4 standard specifically governs tapping screws
—fasteners that create their own threads as they are driven into materials like sheet metal or plastic. By standardizing every millimeter of a screw’s head, drive type, and thread pitch, ASME ensures that an engineer in Tokyo can design a product that can be reliably assembled with parts manufactured in Chicago. A Catalog of Engineering Solutions
What makes the B18.6.4 standard fascinating is its exhaustive variety. It isn't just about one type of screw; it is a library of mechanical solutions: ASME B18.6.4 Tapping Screws Standard | PDF - Scribd
Once you have identified the correct standard (e.g., ASME B16.9 instead of the phantom B1864), you need to acquire the PDF legitimately.
ASME B18.64 – Metric Helical Coil Screw Thread Inserts establishes the uniform dimensional, mechanical, and performance requirements for metric helical coil inserts. These inserts are used to:
The standard covers inserts for metric threads from M2 x 0.4 up to M39 x 4. It specifies:
⚠️ Note: There is no ASME B18.64 free PDF available legally. ASME (American Society of Mechanical Engineers) protects its copyrighted standards.
The American Society of Mechanical Engineers (ASME) uses a logical nomenclature for its standards. The "B" series refers to fasteners, piping, and fittings. Within this series, the most famous families are B16 (Pipe Flanges and Fittings), B18 (Fasteners), and B31 (Pressure Piping). Materials: The standard specifies the materials that can
The number "1864" does not fit into any active ASME catalog. The most plausible explanations for the search term "ASME B1864 PDF" include:
The second half of the phantom "B1864" standard points to ASME B16.4 - 2021: Gray Iron Threaded Fittings.