1/4-20 x 3/8 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.
Use this configuration for electrical panel hardware, equipment covers, control handles, and field service replacement work when the job calls for a headless screw and flat-blade drive access. A straight slot transmits less seating torque than a hex socket; when maximum tightening torque governs, compare alloy steel socket cup point set screws.
Use Cold Headers for specialty fastener support when maintenance records call for uncommon cup point slotted sizes. Review the tapped-hole depth, screwdriver clearance, and point contact requirements before replacing a different point style.
Technical Highlights
- Drive: Straight Slot (flat-blade screwdriver)
- Point: Cup
- Thread Size: 1/4-20
- Length: 3/8 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.
