4-40 x 3/4 Knurled Point Alloy Steel Socket Set Screw provides a size-specific alloy steel option for designs that rely on knurled cup point contact.

The serrated knurled cup point bites the mating surface and helps resist vibration-driven back-out in blind holes, softer materials, collars, hubs, and adjustment locations.

Typical review points for 4-40 x 3/4 include tooling details, clamp collars, and positioning hardware; it may also fit machine repairs, replacement assemblies, and point-style controlled maintenance work where a headless set screw keeps the outside of the component clear while point contact provides the holding action.

The 4-40 thread designation identifies a UNC inch thread with 40 threads per inch, and the 3/4 in. length should be checked against tapped depth, contact location, and drive access.

Review the mating material, surface condition, and allowable witness mark before substituting a different point style. Cold Headers supports industrial set screw sourcing when the point style is easy to overlook on the print.

Technical Highlights

• Point Style: Knurled Point
• Material: Alloy Steel
• Thread Size: 4-40
• Length: 3/4 in.
• Thread Series: UNC
• Threads Per Inch: 40
• Drive Type: Internal Hex