To provide a definitive answer, we consulted the official ASME database and industry legacy archives. As of the latest publication cycle (2024-2025),
An authorized distributor of American National Standards.
| Standard | Title | Common Use Case | | :--- | :--- | :--- | | | Square, Hex, Heavy Hex, & Askew Head Bolts | General industrial hex bolts | | ASME B18.2.2 | Square and Hex Nuts | Heavy hex nuts, jam nuts | | ASME B18.6.4 | Thread Forming & Thread Cutting Tapping Screws | Sheet metal screws, self-tapping fasteners | | ASME B18.3 | Socket Cap, Shoulder, and Set Screws (Inch Series) | Hex socket head cap screws | asme b1864 pdf
This paper provides an in-depth technical exploration of , the governing standard for thread forming, thread cutting, and metallic drive screws in the inch series. Often overshadowed by their machine screw counterparts, tapping screws represent a critical segment of fastener technology, offering distinct advantages in assembly efficiency and cost reduction. This document analyzes the dimensional characteristics, mechanical properties, thread form geometries, and acceptance criteria outlined in the standard. Special attention is given to the distinctions between Type D, F, G, T, and BF screws, as well as the critical metrology of "gaging lengths" and proof load requirements. This paper serves as a guide for design engineers, quality assurance personnel, and procurement specialists seeking to optimize fastener selection and ensure compliance.
Types AB, B, BP, C, D, F, G, T, and others, including thread-forming and thread-cutting functionalities. Recess Styles: Slotted, Phillips, and other drive styles. To provide a definitive answer, we consulted the
Beyond the basic dimensions for screw heads and lengths, the standard includes several critical sections in its appendixes, such as:
If you work extensively with piping, buy the or the B1 Thread Standards Set . This paper serves as a guide for design
Spaced threads with a blunt point. Ideal for heavier sheet metal, plastics, and non-ferrous castings. 2. Thread-Cutting Screws
Gaging instructions for penetration, wobble, and protrusion.