1/4-20 x 1 Cup Point Slotted Headless Set Screw provides a cup point and straight slot drive for service work where a flat-blade screwdriver is the practical tool. 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.
Engineers and repair technicians may specify this size for plant maintenance, shop repair, instrument housings, and service records calling out slotted hardware when below-surface installation is required. Carbon steel should be kept dry and oiled; ask about stainless options when environmental exposure is part of the job. Square Head Set Screws remain a wrench-driven alternative in this catalog section.
Cold Headers supports exact-size sourcing when a drawing or parts list calls for slotted headless set screw hardware. Check the diameter, length, drive access, mating material, and whether cup-point marking is acceptable before ordering.
Technical Highlights
- Drive: Straight Slot (flat-blade screwdriver)
- Point: Cup
- Thread Size: 1/4-20
- Length: 1 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.
