1/4-28 x 1/4 Cup Point Slotted Headless Set Screw uses a straight slot drive so a flat-blade screwdriver can seat the cup point without matching an internal socket size. The straight slot is useful in service kits, older equipment, and awkward access points where a screwdriver reaches more naturally than a key. Standard cup proportions run roughly 0.55 to 0.62 of nominal thread diameter, which is why the exact thread size matters.

The format suits service parts, restoration hardware, light mechanical stops, and replacement set screw inventories when a slotted headless set screw is already shown on the drawing or parts list. For stainless material requirements, review Cup Point 18-8 Stainless Socket Set Screws.

For odd lengths or older slotted hardware callouts, Cold Headers can help identify the closest catalog path. The dimensional reference is ASME B18.6.2, cited here only as the slotted headless set screw dimensional standard.

Technical Highlights

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