Bulk 7/8"-9 UNC Knurled Cup Point Socket Set Screws, Thermal Black Oxide

Alloy Steel | Coarse Thread | Vibration-Resistant Design

Achieve robust, vibration-resistant fastening for large-scale assemblies with Bulk 7/8"-9 UNC Knurled Cup Point Socket Set Screws. Made from high-strength alloy steel and finished in thermal black oxide, these set screws provide both durability and moderate corrosion resistance. Their knurled cup point features serrations that dig into the mating surface, preventing loosening under vibration or heavy torque. This makes them ideal for securing shafts, gears, collars, and pulleys in demanding industrial environments.

Key Features

• Thread Size: 7/8"-9 UNC (Coarse Thread)
• Point Type: Knurled Cup Point for superior vibration resistance
• Material: High-strength alloy steel for reliable performance
• Finish: Thermal black oxide for mild corrosion resistance and a smooth, dark appearance
• Drive Style: Internal Hex Socket (Allen wrench/hex key required)
• Application: Ideal for securing collars, pulleys, gears, and rotating components
• Bulk Packs: Cost-effective for large-scale usage or frequent replacements

Why Knurled Cup Point Set Screws?

Knurled cup point set screws are designed to dig into the contact surface, delivering high torsional holding power. This feature significantly reduces loosening caused by vibration or torque, making these screws especially useful for equipment subjected to repetitive motion or heavy loads.

Ideal Applications

• Collars, Gears, & Pulleys on Shafts
• Construction, Mining, & Industrial Machinery
• Automotive & Truck Repair
• High-Torque & High-Vibration Assemblies
• Maintenance & Replacement Parts for Heavy Equipment

Installation Tips

• Use a suitably sized hex socket/Allen wrench to avoid drive damage.
• Apply consistent torque to ensure secure fastening without over-tightening.
• Maintain a clean contact surface to maximize grip and reduce slippage.
• Periodically inspect set screws in high-vibration environments to confirm tightness.

Order in Bulk Today

Invest in dependable, vibration-resistant fasteners with Bulk 7/8"-9 UNC Knurled Cup Point Socket Set Screws. Order now to take advantage of fast shipping, bulk discounts, and the performance you need for demanding industrial applications.

✔️ Knurled cup point delivers secure hold under vibration

✔️ Thermal black oxide finish for moderate corrosion resistance

✔️ Perfect for heavy machinery and rotating assemblies