Choosing M5 x 50mm screws involves assessing material, finish, and application range. This guide highlights five reliable options from Amazon, covering stainless steel, alloy steel, and coated varieties. Each product features full threading, hex socket drives, and matching hardware for quick installs. Consider compatibility with your tools, corrosion exposure, and load requirements when selecting, especially for electronics, furniture, and machinery repairs. The table below provides a quick snapshot of the featured sets to help you compare at a glance.
| Product | Brand | Material / Finish | Includes |
|---|---|---|---|
| BNUOK (30 Sets) M5 x 50mm Hex Socket Head Cap Screws | BNUOK | 304 Stainless Steel | Screws, nuts, flat & lock washers, hex spanner |
| BNUOK (30 Sets) M5 x 50mm Hex Socket Head Cap Screws (12.9 Alloy) | BNUOK | 12.9 Alloy Steel, Black Oxide | Screws, nuts, washers, hex spanner |
| Sutemribor 35 Pieces M5 x 50mm | Sutemribor | 304 Stainless Steel | 35 pieces, pan head, includes Phillips |
| MroMax 10Pcs M5 x 50mm | MroMax | 304 Stainless Steel | 10 pieces, full thread, Phillips head |
| Bemaka 200PCS Black M5 Button Head | Bemaka | 10.9 Alloy Steel | 200 pieces, washers, hex wrench |
BNUOK 30 Sets: M5 x 50mm 304 Stainless Steel Kit
The BNUOK kit includes 30 sets of M5 screws with nuts, flat and lock washers, plus a hex spanner. Made from 304 stainless steel, these screws offer corrosion resistance and durable performance in general purpose applications. The hex socket drive provides strong torque and stable seating, suitable for electronics enclosures, small appliances, and light machinery. The set’s full-thread design ensures consistent engagement along the entire length, while the bright finish helps with visibility in assemblies. Use with compatible nuts and washers to secure panels and frames. Note potential slight magnetism, typical for 304 stainless steel.
BNUOK 30 Sets: M5 x 50mm, 12.9 Alloy Steel (Black Oxide)
This variant uses high-hardness 12.9 grade alloy steel with a black oxide finish for superior wear resistance and corrosion defense in more demanding environments. Suitable for heavy-duty repairs, metal-to-metal assemblies, and equipment maintenance where higher tensile strength is beneficial. The kit typically includes washers and nuts, ensuring complete fastening options. The drive is an Allen hex socket, enabling precise torque control with standard hex drivers. Applicable for hobbyist projects, RC builds, and light industrial tasks where heat and moisture exposure could challenge lower-grade fasteners.
Sutemribor 35 Pieces: M5 x 50mm, 304 Stainless Steel
These Sutemribor screws are made of 304 stainless steel with a Phillips pan head. The pack includes 35 pieces, all fully threaded with a 0.8mm pitch, ensuring robust engagement across metal and plastic materials. The Phillips head is common in consumer and DIY applications, providing ease of use for enthusiasts and professionals alike. The smooth surface and corrosion resistance make these screws suitable for electronics enclosures, cabinetry, and machinery where a neat, low-profile fastener is desirable. This kit emphasizes general versatility with reliable stainless steel performance.
MroMax 10 Pcs: M5 x 50mm, 304 Stainless
The MroMax set features 304 stainless steel truss head Phillips machine screws. The tray includes 10 full-thread screws that offer a larger head surface for distributing load and reducing pull-out risk in softer materials. The truss head design helps achieve a clean external appearance in appliance casings and electronics assemblies while maintaining a secure hold. With an 0.8mm thread pitch and 5mm diameter, these are well-suited for projects requiring reliable fastening under moderate stress and moisture exposure. The 304 stainless stock resists rust and staining in typical workshop environments.
Bemaka 200PCS: Black M5 Button Head, 10.9 Alloy Steel
This Bemaka assortment provides 200 pieces of M5 button head screws in a black oxide finish, made from 10.9-grade alloy steel for high strength. The package includes nuts and washers, plus a hex wrench for quick installation. The button head profile offers a low-profile aesthetic with flat-to-rounded sides, making it ideal for machinery panels, electronics housings, and furniture upgrades where space constraints exist. The 10.9 grade material supports higher torque demands, but care should be taken to avoid over-torquing thin materials that could crush under high pressure.
Sutemribor 35 Pieces: M5 x 50mm Button Head, 304 Stainless
These Sutemribor button head screws are 304 stainless steel with a fully threaded design. The 5mm diameter and 50mm length provide strong fastening across panels and metal frames. The button head profile allows for smooth edges, reducing snag hazards in equipment enclosures and cabinets. With a recessed hex drive, installation is straightforward using standard hex wrenches. The kit includes 35 pieces in a consistent silver finish, suitable for electronics, automotive projects, and DIY repairs where a neat, low-profile fastener is preferred.
Buying Guide: Key Considerations For M5 X 50mm Screws
- Material and Finish: Stainless steel (304) offers corrosion resistance and good strength for general use, while higher-strength alloys like 12.9 provide enhanced durability for demanding applications. Black oxide finishes reduce glare and provide some corrosion resistance, but are not as robust as stainless steel in highly corrosive environments.
- Head Type and Drive: Hex socket (Allen) heads provide high torque transfer and less stripping risk, while button heads offer a lower profile for neat assemblies. Pan heads and truss heads distribute load differently and suit various surface contours.
- Threading: Full-threaded screws engage across the entire length, ideal for uniform gripping in thin or soft materials. When working with hard metals, ensure threads align to prevent cross-threading.
- Size Compatibility: M5 x 50mm refers to a 5mm major diameter and 50mm length; confirm the thickness of the material you are fastening to avoid protrusion or insufficient thread engagement.
- Included Hardware: Some kits include nuts, washers, and a hex wrench; this adds convenience and ensures you have all needed components for a complete install.
- Application Range: Electronics enclosures, cabinetry, furniture assembly, 3D printers, RC models, and machinery repairs all benefit from standardized M5 fasteners, but verify load and environmental requirements.
- Corrosion and Environment: In humid or outdoor settings, stainless steel often outperforms coated steels. For high-strength needs, consider alloy steel options with proper coatings.
- Tooling: A set of hex keys or a hex bit in your drill/driver will speed up installation. Check bit size compatibility with the screw drive (commonly 4.0 mm hex size for M5 screws in these kits).
Overall, the highlighted sets offer a range of materials, finishes, and included hardware to support diverse projects. When choosing, balance strength, corrosion resistance, and compatibility with your target materials to optimize performance and longevity.