Bulk #4-40 Socket Set Screws, Cup Point, Alloy Steel, Thermal Black Oxide

Coarse Thread | High-Strength Alloy Steel | Cup Point Design

Secure your assemblies with Bulk #4-40 Socket Set Screws, Cup Point, crafted from alloy steel for superior durability and treated with a thermal black oxide finish for mild corrosion resistance. Designed with a hex socket drive for precise torque control, these screws deliver reliable, non-protruding fastening. The cup point features a concave tip that grips surfaces securely, making it ideal for high-vibration or alignment-critical applications.

Key Features

• Thread Size: #4-40 (Coarse Thread)
• Point Type: Cup Point for secure holding power
• Material: High-Strength Alloy Steel for durability
• Finish: Thermal Black Oxide for mild corrosion resistance
• Drive Style: Hex Socket (Allen wrench required)
• Thread Profile: UNC / Coarse Thread for easy installation
• Application: Gears, collars, pulleys, and alignment-critical assemblies
• Bulk Packs: Cost-effective for industrial and manufacturing use

Why Choose Cup Point Set Screws?

The cup point design features a concave tip that bites into the contact surface, offering exceptional grip and vibration resistance. This design is ideal for applications requiring a strong hold and minimal slippage, such as alignment-sensitive machinery, gears, and collars.

Ideal Applications

• Machinery & Equipment Alignment
• Automotive & Aerospace Fastening
• High-Vibration & High-Torque Assemblies
• General Maintenance & Repair (MRO)
• Securing Gears, Collars, & Pulleys

Installation Tips

• Use a properly sized hex key (Allen wrench) to prevent rounding out the drive.
• Apply consistent torque to avoid thread or drive damage.
• Ensure mating surfaces are clean and free of debris for optimal grip.
• For high-vibration setups, consider a thread-locking compound to maintain tightness.

Order in Bulk Today

Get strong, vibration-resistant fastening with Bulk #4-40 Socket Set Screws, Cup Point. Order now for fast shipping, bulk discounts, and superior performance in all your critical assemblies.

✔️ Hex socket drive for accurate torque application

✔️ Cup point design bites into surfaces for secure holding power

✔️ Thermal black oxide finish for mild corrosion resistance