It is by far the most common screw found inside computer cases. The optional UNC specification indicates the standard coarse thread is used which is defined for #6 screws as 32 tpi rendering 'UNC' redundant, however it may be seen when other specifications such as plating or other treatments are also specified. The #6-32 UNC is a UTS screw specifying a major thread diameter of #6 which is defined as 0.1380 inches (3.51 mm) and 32 tpi (threads per inch) which equates to a thread pitch of 0.031250 inches (0.7938 mm). More modern cases from certain manufacturers ( Dell, Gateway) and enthusiast cases will lack screws altogether, instead utilizing a tool-less design.
#Pc fan sizes chart serial
#4-40 UNC thumb screws are often found on the ends of DVI, VGA, serial and parallel connectors. Motherboards and other circuit boards often use a #6-32 UNC standoff. The M3 threaded holes are often found on 5.25" optical disc drives, 3.5" floppy drives, and 2.5" drives. The #6-32 UNC screws are often found on 3.5" hard disk drives and the case's body to secure the covers. In turn, these thread standards define preferred size combinations that are based on generic units-some on the inch and others on the millimetre. The Unified Thread Standard (UTS) originates from the United States, while the ISO metric screw thread is standardized worldwide. Although there are numerous manufacturers of computer cases, they have generally used three thread sizes.
#Pc fan sizes chart Pc
From left to right: a #6-32 UNC thumbscrew, a #6-32 UNC screw, an M3 screw and a self-tapping screw for case fansĬomputer case screws are the hardware used to secure parts of a PC to the case.
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