4-40 x 1/8 Half Dog Point Alloy Steel Socket Set Screw is a compact internal-hex set screw for locating parts through a shorter cylindrical tip.
For alignment work, the mating feature should be checked so the dog point enters cleanly and does not bottom before the set screw is seated.
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 1/8 include keyways, mating holes, and retained adjustment points and keyways, mating holes, and retained adjustment points where the blunt pilot is part of the assembly fit.
Thread arithmetic for 4-40: 40 TPI in the UNC series; compare the 1/8 in. length with tapped depth and pilot reach. For retrofit work, compare the end style against the original part before treating it as a generic set screw. Cold Headers helps buyers keep dog-point details attached to the size being quoted.
