5-40 x 1/2 Flat Point Alloy Steel Socket Set Screw identifies a flat point socket set screw where the installed fastener is contained within the threaded component.
For 5-40 x 1/2, review the flat point around equipment rebuilds where the original point style must be retained and hubs, brackets, and retained components with prepared flats. The broad end face suits prepared flats, repeated adjustment, and jobs where unnecessary deformation of the mating component would create service problems.
The 5-40 designation supplies the ordering thread form, and the 1/2 in. length should be checked against tapped depth and bearing location. Check the length against tapped depth and bearing location so the flat end reaches the intended surface. Use the alloy steel callout with the drawing or bill of material, then review the mating surface and operating environment separately.
The UNC series and 40 threads per inch are derived from the thread designation. A prepared mating flat helps the end seat evenly so the screw does not rock on an irregular contact area. Cold Headers helps keep flat-ended set screw details attached to the size being quoted.
