Some state libraries and local chapters of ASME maintain reference copies.
To summarize:
If you need immediate assistance identifying the correct standard, consult your company’s senior engineer or a certified piping designer. They will confirm that the document you actually need is one of the genuine B16 or B18 series standards—not the elusive ASME B1864.
Disclaimer: This article is for informational purposes only. Standard numbers, availability, and pricing are subject to change. Always refer to the official ASME website for the latest information on standards publications.
ASME B18.6.4 standard is an essential technical document that specifies the general and dimensional requirements for thread-forming and thread-cutting tapping screws as well as metallic drive screws (Inch Series). The American Society of Mechanical Engineers - ASME Key Document Details Official Name
: ASME B18.6.4 - Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (Inch Series). Current Status : As of February 2013, B18.6.4 has been consolidated into ASME B18.6.3
(Machine Screws, Tapping Screws, and Metallic Drive Screws). Latest Standalone Version
: The 1998 edition, reaffirmed in 2005, is the most commonly referenced standalone PDF. The American Society of Mechanical Engineers - ASME What is Inside the Standard?
The PDF contains critical data for manufacturing and quality control, including: Head Types
: Detailed dimensions for flat countersunk (82° and 100°), oval countersunk, pan, fillister, truss, and hex head styles. Thread Types : Specifications for Type A, AB, B, D, F, G, and T screws. Technical Data Dimensional tables for body, thread, and point designs. Wrench opening sizes for hex head products.
Gaging instructions for penetration, wobble, and protrusion.
Formulas for determining effective grip lengths and dimensional limits. Where to Find the PDF
Official copies can be purchased from authorized standards organizations: ASME B18.6.4 Tapping Screws Standard | PDF - Scribd
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 asme b1864 pdf
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)
The ASME B18.6.4 standard defines the dimensional and performance requirements for tapping screws and metallic drive screws in the United States. While many older technical documents still refer to it, users should note that this standard was officially consolidated into ASME B18.6.3 to streamline fastener specifications. 🔩 Scope and Purpose
ASME B18.6.4 covers "Inch Series" fasteners used to create their own mating threads in materials like sheet metal, plastic, and plywood. It provides:
Dimensional Data: Head diameters, slot depths, and thread pitches.
Performance Standards: Torsional strength, core hardness, and case depth.
Gaging Instructions: Methods for measuring protrusion, wobble, and penetration of different head types. đź“Ź Common Screw Types
The standard categorizes screws based on how they interact with the material:
Thread-Forming (Types AB, B, BP, U): Displace material to form a thread; often used in thin metal or plastics.
Thread-Cutting (Types D, F, G, T): Have flutes or slots to cut a thread, similar to a tap; used in heavier metals.
Metallic Drive Screws (Type U): Multiple-start threads designed to be hammered into pre-drilled holes for permanent or tamper-resistant joints. ⚠️ Status Update: Consolidation Some state libraries and local chapters of ASME
As of 2013, the ASME B18.6 subcommittee combined B18.6.4 (Tapping Screws) and B18.6.3 (Machine Screws) into a single document. Why? Over 50% of the content was identical.
Current Standard: ASME B18.6.3-2024 is the most up-to-date version for these fasteners. đź“„ How to Access the PDF
Official copies are available through authorized distributors: ASME Direct: Purchase the latest consolidated standard. ANSI Webstore: Access the 1998 (R2005) historical version.
Intertek Inform: Provides the full publication in PDF format for technical reference.
Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws Inch Series | 1998 | Print Book | ASME
Based on search intent analysis, users searching for “ASME B1864 PDF” are almost always looking for:
In the world of mechanical engineering and industrial piping standards, precision is not just a goal—it is a safety requirement. Among the myriad of codes governing pipe threads, flanges, and fittings, one specific designation often generates significant search interest: ASME B1864 PDF.
For engineers, procurement specialists, and maintenance technicians, finding a reliable, legitimate copy of this standard is a common quest. However, a crucial piece of information often gets lost in translation: Does ASME B1864 actually exist as a standalone document?
This article serves three purposes. First, we will clarify the common confusion surrounding the keyword "ASME B1864." Second, we will explain the genuine standards that users likely need (ASME B1.20.1 and ASME B16.4). Finally, we will provide legal, safe, and professional avenues for obtaining official ASME PDFs without violating copyright laws or risking obsolete data.
If you have been searching for an "ASME B1864 PDF," read on to discover the correct standard you need and how to secure it.
Do not risk downloading a supposed "ASME B1864 pdf" from free file-sharing sites. The potential costs—incorrect data, legal exposure, or cybersecurity threats—far outweigh the $80–100 price of the official document. Purchase the PDF directly from ASME or Techstreet, or access it through an institutional subscription.
For casual reference, ASME occasionally offers public review drafts of upcoming revisions free of charge on their website—but these are not the final, citable standard.
Need help identifying another ASME fastener standard? The B18 committee covers over 70 documents, from hex nuts (B18.2.2) to cotter pins (B18.8.1). Double-check your standard number before purchasing.
The ASME B18.6.4 standard, which covers thread-forming and thread-cutting tapping screws and metallic drive screws (inch series), has been superseded and consolidated into ASME B18.6.3. While the 1998 version (reaffirmed in 2005) is still referenced in legacy projects, users are generally directed to the updated ASME B18.6.3-2024 for the most current data. Overview of ASME B18.6.4 If you need immediate assistance identifying the correct
This standard provides comprehensive general and dimensional data for various slotted and recessed head fasteners. ASME B18.6.4 Self-Tapping Screw Specs | 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
, 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
Note: While you searched for "b1864," the correct standard designation is ASME B18.6.4. This content covers the correct standard regarding machine screws and tapping screws.
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