The B18.6.4 standard defines specific recess types to ensure compatibility with driver bits, such as Type I (Phillips) and Type II (though Type II was removed in later revisions due to lack of use). 3. Thread Types
Always verify the specific year/revision required by your project contract (e.g., ASME B18.6.4-1998, ASME B18.6.4-2005, or the latest active version) before finalizing procurement orders.
: Definitions for grip length, body length, and thread types to ensure clear communication between designers and manufacturers. Major Screw Types and Classifications asme b1864 pdf
This standard details the basic dimensions and gauging requirements for the most common pipe thread in North America: . It covers:
Used when a flush surface is required. Hex Washer Head: Often used for higher torque applications. Technical Specifications: What to Look For The B18
Requirements for surface hardening to ensure the screw can pierce or cut through the host material without stripping its own threads.
If you look at the alphanumeric string, B1864 visually merges B1.20.1 and B16.4 into a single, non-existent number. It is highly likely that a user searching for "ASME B1864 PDF" actually needs information regarding (B1.20.1) or cast iron threaded fittings (B16.4). In some cases, users may also be confusing it with the obsolete MIL-P-1864 military specification for hose couplings. : Definitions for grip length, body length, and
ASME B18.6.4 is the authoritative standard in North America for these fasteners in the Imperial (Inch) system. It establishes the accepted dimensions, tolerances, and nomenclature, ensuring interchangeability and predictable performance. The standard covers three primary categories:
Caution: Avoid using outdated or unauthorized PDF copies, as dimensional requirements for thread forming may change, causing failures in critical assemblies. Common Applications and Types