M2–M6 Black 304 Stainless Hex Socket Flat Head Cap Nuts
M2–M6 Black 304 Stainless Hex Socket Flat Head Cap Nuts
Details
M2–M6 Black 304 Stainless Steel Hex Socket Large Flat Head Cap Nuts
Upgrade your fastening game with these precision-engineered Black 304 Stainless Steel Hex Socket Cap Nuts. Available in thread sizes M2, M3, M4, M5, and M6 with lengths ranging from 4 mm to 50 mm, these versatile sleeve cap nuts are built to deliver a secure, flush-fitting connection in woodworking, furniture assembly, electronics enclosures, DIY projects, and mechanical builds alike.
Key Features
- Material: Premium 304 stainless steel — corrosion-resistant, strong, and long-lasting
- Surface Finish: Sleek matte black coating for a clean, professional look
- Drive Style: Hex socket (Allen key) for reliable torque and easy installation
- Head Style: Large flat/pan head for wide load distribution and a flush finish
- Thread Sizes: M2 / M3 / M4 / M5 / M6
- Length Range: 4 mm – 50 mm (size denoted as d × L, e.g. M4×20 means 4 mm thread diameter × 20 mm body length, excluding head)
- Customizable: Multiple size combinations available to suit your exact project requirements
- Application: Rivet connectors, insert joints, sleeve caps — ideal for furniture, cabinetry, electronics, robotics, and general mechanical assembly
Specifications
| Attribute | Detail |
|---|---|
| Material | 304 Stainless Steel |
| Surface | Black |
| Thread Sizes | M2, M3, M4, M5, M6 |
| Length | 4 mm – 50 mm |
| Drive Style | Hex Socket (Allen Key) |
| Head Style | Large Flat / Pan Head |
| Screw Type | Machine Screws / Cap Nut |
| Country of Origin | Made in China |
Perfect For
- Furniture and cabinetry assembly
- Electronics enclosures and panel mounting
- Robotics and maker/DIY builds
- Mechanical and structural joining
- Any project requiring a secure, stylish black stainless fastener
Related Products You May Like
- 10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips
- 12pcs 16mm Momentary Push Button Switch 1NO Metal 2-Pin Self-Reset
- 10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What thread sizes are available for these black stainless steel hex socket cap nuts?
A: These cap nuts are available in M2, M3, M4, M5, and M6 thread sizes, with body lengths ranging from 4 mm to 50 mm. The size notation is d×L — for example, M4×20 means a 4 mm thread diameter and a 20 mm body length (head length not included).
Q: What material are these cap nuts made from, and are they rust-resistant?
A: These fasteners are machined from 304 stainless steel, which offers excellent corrosion resistance and durability. The matte black surface finish further enhances their appearance and adds an extra layer of protection against the elements.
Q: What tool do I need to install these hex socket cap nuts?
A: You'll need a standard hex key (Allen wrench) sized to match the socket of your chosen nut. The hex socket drive provides excellent torque and reduces the risk of cam-out compared to flat or Phillips drives.
Q: Are these cap nuts suitable for both indoor and outdoor projects?
A: Yes. The 304 stainless steel construction makes them well-suited for both indoor applications (furniture, electronics, cabinetry) and outdoor or mildly humid environments where corrosion resistance is important.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.