5-40 x 3/16 Knurled Point Alloy Steel Socket Set Screw is specified when the drawing calls for an alloy steel set screw with a knurled cup point and compact drive access.
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 5-40 x 3/16 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 5-40 thread designation identifies a UNC inch thread with 40 threads per inch, and the 3/16 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.
