4-40 x 3/8 Half Dog Point Alloy Steel Socket Set Screw provides exact thread and length identification for controlled set screw location work.

Because the tip is blunt and cylindrical, it can locate in a prepared hole or keyway without the surface penetration associated with cone or cup styles.

This family is suited to industrial mechanical assemblies where a steel half dog point screw is part of the locating method.

Typical review areas for 4-40 x 3/8 include couplings, handles, collars, and shaft-mounted accessories and maintenance bins, equipment rebuilds, and point-style controlled sourcing where the blunt pilot is part of the assembly fit.

Thread arithmetic for 4-40: 40 TPI in the UNC series; compare the 3/8 in. length with tapped depth and pilot reach. Match the thread designation and length together because each affects where the cylindrical tip lands. Cold Headers assists with exact-size sourcing when the shortened pilot is part of the purchase requirement.

Technical Highlights

• Point Style: Half Dog Point
• Material: Alloy Steel
• Thread Size: 4-40
• Length: 3/8 in.
• Thread Series: UNC
• Threads Per Inch: 40
• Drive Type: Internal Hex