Designed for compact set-screw fastening, 5/16-18 x 3/8 18-8 Stainless Steel Cup Point Socket Set Screw combines 18-8 stainless steel construction with a cup-shaped point for localized contact at the mating surface.

Typical use cases include machinery repairs, control hardware, and shaft-mounted parts, especially where the fastener is driven through the threaded component. The internal hex drive keeps installation access compact while the headless body remains contained within the mating part.

For purchasing and replacement work, confirm the 5/16-18 thread, 3/8 in. length, socket size, and cup point diameter match the drawing or installed part. Confirm that point contact, material, and service conditions fit the application. Use it where the assembly calls for a general-purpose stainless set screw rather than carbon or specialty material. The recessed end form is often chosen where a witness mark or indentation on the mating surface is acceptable for the holding method. Cold Headers has supplied specialty socket fasteners since 1962 and helps buyers identify difficult stainless set screw configurations.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 5/16-18
• Length: 3/8 in.
• Point Style: Cup Point
• Nominal Screw Diameter: 0.312 in.
• Hex Socket Size: 5/32 in.
• Cup Point Diameter: 0.156-0.172 in.
• Drive Type: Internal Hex

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.