1/4-28 x 5/8 Cup Point Slotted Headless Set Screw is a carbon steel slotted headless set screw for adjustments that need simple drive access and below-surface installation. Because the screw has no head, it can thread below the surface of a collar, hub, knob, or housing when the tapped hole permits. The cup point is commonly used where localized holding contact is desired and the mating surface can tolerate set screw marks.

This size is relevant for appliance repair, instrument repair, fan hubs, and adjustment points on compact equipment, especially when the slotted drive is already part of the equipment design. Compare Cup Point Alloy Steel Socket Set Screws when socket-drive tightening is preferred.

Cold Headers has supplied specialty fasteners since 1962 and supports hard-to-find slotted set screw sourcing. Selection should reflect the shaft surface, required holding action, access for a flat blade, and the original hardware callout.

Technical Highlights

• Drive: Straight Slot (flat-blade screwdriver)
• Point: Cup
• Thread Size: 1/4-28
• Length: 5/8 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.