25Pcs 6#-32 UNC Torx Countersunk Cap Screws Black Grade 10.9

25-Piece 6#-32 UNC Black Carbon Steel Grade 10.9 Countersunk Six-Lobe Torx Socket Cap Screws

Upgrade your fastening projects with these premium 6#-32 UNC Countersunk Six-Lobe Torx Socket Cap Screws. Crafted from high-strength Grade 10.9 black carbon steel, these machine screws deliver exceptional torque resistance, secure clamping force, and a flush, professional finish ideal for demanding mechanical and DIY applications.

Key Features

• Material: Black carbon steel — corrosion-resistant black oxide finish for added durability
• Grade: 10.9 high-tensile strength for heavy-duty fastening performance
• Thread Standard: 6#-32 UNC (Unified National Coarse) for compatibility with standard imperial hardware
• Head Style: Countersunk — sits flush with or below the material surface for a clean, snag-free result
• Drive Type: Six-Lobe Torx (Hex Socket) — reduces cam-out, allows higher torque application, and increases bit longevity
• Available Lengths: 8.4mm / 9.1mm / 10mm / 11.3mm — choose the size that fits your application perfectly
• Package Quantity: 25 pieces per pack

Specifications

Ideal Applications

• Machinery assembly and maintenance
• Electronics enclosures and panels
• Automotive and mechanical builds
• Woodworking and metalworking projects
• DIY fabrication and repairs requiring flush-mount fasteners

Why Choose Six-Lobe Torx Drive?

Unlike standard Phillips or slotted heads, the six-lobe Torx design distributes torque evenly across six contact points, virtually eliminating cam-out. This means faster, more reliable tightening and fewer stripped heads — even in high-torque situations.

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Frequently Asked Questions

Q: What does Grade 10.9 mean for these carbon steel Torx cap screws?

A: Grade 10.9 is a high-tensile strength classification for carbon steel fasteners. It means these screws have a minimum tensile strength of 1040 MPa, making them suitable for high-stress mechanical assemblies where a strong, reliable connection is critical.

Q: What tools are needed to drive these six-lobe Torx socket cap screws?

A: These countersunk screws require a Torx (six-lobe star) driver bit or hex socket key that matches the 6#-32 head size. Using the correct Torx bit ensures maximum torque transfer and prevents damage to the drive recess.

Q: Are these screws suitable for use with standard UNC-threaded nuts and inserts?

A: Yes. The 6#-32 UNC thread is a standard Unified National Coarse imperial thread. These screws are fully compatible with any standard 6#-32 UNC threaded nuts, inserts, tapped holes, or other UNC-threaded hardware components.

Q: Can I use these screws outdoors or in damp environments?

A: These screws feature a black oxide finish that offers a degree of corrosion resistance for general use. For prolonged outdoor or high-moisture exposure, applying a light oil or protective coating is recommended to extend their service life.

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.