5/16-18 x 1 1/2 Cup Point Slotted Headless Set Screw is selected when legacy equipment, blind access, or simple service tooling calls for a slotted headless set screw. The headless form keeps the fastener contained in the tapped component while the screwdriver slot remains the drive interface. The cup point uses a hollow rim for localized contact on the mating shaft or component surface.

This size is relevant for gears in light equipment, fixture stops, bracket retainers, and general maintenance stock, especially when the slotted drive is already part of the equipment design.

Cold Headers is a Chicago specialty fastener distributor focused on practical replacement and sourcing support. Confirm the exact thread size and length, especially on legacy equipment where near-size substitutions can cause service problems.

Technical Highlights

• Drive: Straight Slot (flat-blade screwdriver)
• Point: Cup
• Thread Size: 5/16-18
• Length: 1 1/2 in.
• Material: Carbon Steel
• Cup Point Diameter: approx. 0.55-0.62 x nominal diameter
• Head: None (headless, installs below surface)
• Dimensional Standard: ASME B18.6.2

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