Square Head Set Screw Cup Point 1/4-20 x 3/4" Case Hardened Steel, 100-Pack by Newport Fasteners

Cup point Set Screws are headless screws whch are threaded the entire length. They have an internal hexagonal drive at one end and a cup-shaped indentation at the other end. The cup point is the most popular style set screw. Designed for fast, permanent and semi-permanent location of parts on shafts with hardness differential of 10-15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable.

• Thread: Coarse thread Full Thread / MATERIAL: Case Hardened Steel Plain Finish Rockwell B80
• Thread Diameter-Pitch: 1/4-20, Length: 3/4 inch
• Also called Square Head Grub Screws, Square Drive Set Screws, Square Head Bolts, Square Set Screws
• Standard/Spec: ASME B18.6.2, RoHS: RoHS 3 (2015/863/EU) Compliant, REACH: REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
• Crafted from case-hardened steel, these 1/4-20 square head set screws deliver superior durability and resistance to wear—ideal for demanding machinery and automotive applications.
• Easy Installation with Square Head: Full-thread square head bolts offer simple, tool-friendly tightening with a wrench—great for quick assembly in tight spaces or heavy-duty projects.
• Secure Cup Point Design: The cup point digs into surfaces for a tight, vibration-resistant hold, ensuring reliable locking of gears, pulleys, or shafts without slipping.
• The cup point has a circular, concave tip that digs into the mating surface (e.g., a shaft or gear). This creates a strong, frictional grip, preventing slippage or rotation under load.
• The cup point works well on softer metals (e.g., aluminum) or even harder surfaces (e.g., steel), biting in without needing a pre-drilled spot like a cone point might.