1/4-28 x 2 1/4 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 1/4-28 x 2 1/4 include automation equipment, fixture blocks, and serviceable machine covers; it may also fit gears, pulleys, sprockets, and adjustable stops where a headless set screw keeps the outside of the component clear while point contact provides the holding action.
The 1/4-28 thread designation identifies a UNF inch thread with 28 threads per inch, and the 2 1/4 in. length should be checked against tapped depth, contact location, and drive access.
Use the listed thread and length with the existing drawing or service record so the set screw reaches the intended contact area. Cold Headers helps maintenance and purchasing teams identify the requested set screw without turning it into a generic substitute.
