ASME/ANSI B18.6.3 Cross Recessed Pan Head Machine Screws

ASME/ANSI B18.6.3 Cross Recessed Pan Head Machine Screws are designed for fastening components to pre-tapped holes, threaded inserts, or nuts where a raised screw head is acceptable. Unlike countersunk screws, the pan head remains above the mounting surface and does not require a countersunk hole, which can simplify the preparation of the mating component. The rounded head provides a defined bearing surface for securing the attached part while maintaining a relatively compact profile.

The cross-recessed drive provides straightforward access for installation with a compatible screwdriver or bit, making these screws practical for assembly and service work. They are commonly selected for equipment panels, electrical and instrument enclosures, brackets, machine components, sheet-metal assemblies, and general mechanical equipment. Depending on the application, customers can select the appropriate thread size, screw length, material, mechanical grade, and surface finish to match the mating thread and required service conditions.

Specification:

Dimension Chart of ASME/ANSI B18.6.3 Pan Head Screws:

The dimension chart provides the key measurements for selecting the screw and matching it with the mating thread and installation tool. Nominal diameter and length determine the basic thread engagement, while head diameter and head height should be checked when space around the screw head is limited. The cross-recess size is also important for selecting the correct screwdriver or driver bit.