Sutemribor Button Head Socket Cap Screws, M4 x 25mm

For anyone assembling machinery, small fixtures, or removable panels, these screws offer a consistent size and a rounded, low-profile head. The fully threaded M4 x 25mm format is intended for joints where the full screw length can engage the assembly.

They’re supplied in a 55-piece pack, with a hex wrench included. That makes them useful for keeping a matching set on hand for repairs or repeat assembly work.

The key decision is fit: the length, thread pitch, and head shape all need to suit the hardware and available clearance in your project.

Best use cases

These button head socket cap screws make sense for machine assembly and other projects where parts may need to be fastened and removed later. The recessed hex drive is used with a hex wrench, while the rounded head gives a different profile from a countersunk screw that sits flush with a surface. For a removable panel, for example, you can secure the panel with the wrench and take it off again for access without treating the joint as permanent.

They may also suit small assemblies involving instruments, electronics, household appliances, lights, toys, or similar equipment, provided the project calls for this exact thread and length. What does that mean at the workbench? You can use the same screw size across a set of matching attachment points instead of reaching for a mixed assortment and hoping one fits. It’s a great fit if you need M4 hardware for a serviceable assembly and want multiple matching screws in one pack.

Product specs

• Type: Button head socket cap screw
• Size: M4 x 25mm
• Thread pitch: 0.7mm
• Material: 304 stainless steel
• Finish: Silver
• Threading: Fully threaded
• Package: 55 screws and a hex wrench

The manufacturer describes the steel as corrosion- and rust-resistant. That can be relevant for hardware exposed to less-than-ideal conditions, but the listing doesn’t specify a particular environment or provide a performance rating. Check that your assembly uses a 0.7mm pitch and has room for the 25mm screw length, the size is not interchangeable with hardware chosen only by head appearance.

Where it shines

The practical advantage is a combination of a recessed hex drive and a rounded button head. The supplied wrench means there’s a tool in the package for tightening the screws, and the socket drive is designed to help reduce slipping at the drive compared with a plain slotted head. Stainless steel construction is another reason to consider this set when you want metal fasteners rather than a basic assortment of mixed materials.

There is a trade-off: these are not the right choice when a project needs a flush, countersunk head, or when a 25mm screw would interfere with components behind the fastening point. A general-purpose mixed kit may be more flexible if you don’t yet know which sizes your repair will require, this set is more focused on jobs that specifically call for M4 x 25mm screws. On the spec sheet, the dimensions and material are clear, but there’s no additional information about strength ratings or a hex wrench size.

Should you buy it?

Choose this pack when your project calls for fully threaded M4 x 25mm button head screws with a 0.7mm pitch, especially for an assembly you expect to open again. The 55-piece quantity can also be useful for repeated attachment points or keeping spares with your repair supplies. It’s not for you if the existing fastener uses another length or thread pitch, or if the design requires a flush head. Match the measurements to the fastener you’re replacing before starting, that matters more than the broad list of possible applications.