1/2-20 x 5/8 Knurled Point Alloy Steel Socket Set Screw is chosen where serrations at the point help the screw hold position against a prepared or softer mating surface.
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 1/2-20 x 5/8 include handles, couplings, stops, and light indexing components; it may also fit production machinery that uses internal hex set screws to avoid external head clearance where a headless set screw keeps the outside of the component clear while point contact provides the holding action.
The 1/2-20 thread designation identifies a UNF inch thread with 20 threads per inch, and the 5/8 in. length should be checked against tapped depth, contact location, and drive access.
The knurled cup point is usually chosen for localized bite rather than for a locating-hole function. Cold Headers can quote this family by exact thread, length, alloy steel material, and knurled point style.
