Hole Operations

Hole operations, including countersinking, tapping, and pem hardware insertion, significantly boost the functionality of your custom parts. Countersinking ensures a seamless fit for screws, contributing to both aesthetic and structural goals. Tapping adds internal threads to holes, allowing for the use of various fasteners and expanding assembly possibilities. Pem hardware insertion introduces reusable threads to thin sheet metal, making it more convenient for later assembly. These techniques play a vital role in customizing your parts to fit specific design and assembly requirements.


In sheet metal fabrication, tapping plays an essential role in the assembly of parts and their functionalities. It refers to the method of creating internal threads in pre-cut holes of a sheet metal piece, allowing for secure attachment of threaded components like screws or bolts.

Tapping in sheet metal fabrication is crucial for constructing a broad range of products, as it facilitates the assembly and disassembly of components. The process grants design flexibility and enables the creation of durable, robust structures. Whether it's an electronics enclosure, a machine component, or a piece of furniture, if it involves joining sheet metal parts, tapping likely plays a vital role.

ThreadInner DiameterOuter Diameter

Hardware Insertion


Hardware, specifically PEM nuts, are a significant component in sheet metal fabrication, especially when it comes to enhancing the assembly and robustness of sheet metal parts. PEM nuts are a type of self-clinching fastener that, when installed into a pre-cut hole and subjected to sufficient force, clinches into the sheet metal, creating a permanent and strong thread in thin metal sheets.

One of the main advantages of PEM nuts is their capacity to provide strong load-bearing threads in sheet metal applications where it may otherwise be challenging to achieve robust, threaded connections. They are ideal for use with thin sheet metal components where cutting threads (like tapping) is not sufficient.

SizeInner DiameterOuter DiameterPEM Part Number
#4-40 Nut.089.25S-440-1
#6-32 Nut.107.28S-632-1
#8-32 Nut.136.31S-832-1
#10-32 Nut.15.34S-032-1
#10-24 Nut.159.34S-024-1
1/4-20 Nut.201.44S-0420-1
1/4-28 Nut.213.44S-0428-1
M4x0.7 Nut.130.31S-M4-1ZI
M5x0.8 Nut.165.34S-M5-1ZI
M6x1.0 Nut.197.44S-M6-1ZI
M8x1.25 Nut.268.5S-M8-1ZI


Countersinking is a vital process in sheet metal fabrication, particularly when creating components that require a smooth surface with no protruding screw heads or fasteners. This technique involves enlarging the top portion of a pre-drilled hole, creating a tapered seat that allows flat-head screws or bolts to sit flush with or beneath the surface of the sheet metal.


Larger countersinks in thinner materials will enlarge the inner hole diameter. This can cause issues with your part fitment. Please make sure to account for this when designing your parts.
NameInner DiameterOuter Diameter
#4x82º CS.129.255
#6x82º CS.150.307
#8x82º CS.177.359
#10x82º CS.201.411
#10x82º CS.201.411
1/4x82º CS.266.531
1/4x82º CS.266.531
M3x90º CS.150.307
M4x90º CS.177.353
M5x90º CS.217.441
M6x90º CS.260.529