5-40 x 3/8 Knurled Point 18-8 Stainless Steel Socket Set Screw is chosen for equipment where 18-8 stainless material and localized point bite are both required.
Instead of presenting a smooth cup edge, the knurled point creates small teeth at the contact ring so the fastener can resist vibration-driven movement in the right mating material.
The 18-8 stainless construction can be appropriate for instrumentation, packaging equipment, enclosures, and outdoor general-service hardware when the environment and load are compatible with the specified material.
Use cases for 5-40 x 3/8 include automation equipment, packaging machinery, and conveyor components and fixtures, removable stops, shaft-mounted accessories, and couplings where a headless internal-hex screw keeps the component exterior clear.
For 5-40, UNC has 40 threads per inch; check the 3/8 in. length against tapped depth and point location. Use the thread designation and length together when matching prints, service records, or prior purchase history. Cold Headers helps quote specialty stainless socket products by exact thread, length, material, and point style.
