Cup point square head set screws are wrench-driven threaded fasteners used to secure collars, hubs, gears, pulleys, sprockets, couplings, knobs, handles, and other shaft-mounted components. The square head projects above the work, giving an adjustable wrench, box wrench, open-end wrench, or socket positive external engagement — unlike socket set screws, which install flush within the assembly and drive from above with a hex key. That external head is why this traditional drive style remains specified for industrial equipment, agricultural machinery, maintenance work, and legacy designs: it takes ordinary wrenches, accepts firm installation torque, and stays accessible for repeated adjustment throughout the life of the machine.
The recessed cup point concentrates holding force in a ring of rim contact against the mating shaft or component, and depending on the mating material it may leave a witness mark or shallow indentation at the contact point. These fasteners are dimensioned to ANSI/ASME B18.6.2, which defines the full square head set screw geometry: a true square head with controlled width across flats and width across corners, specified head height, a crowned top with a defined head radius, and a relieved neck below the head. The width across flats governs wrench size; the width across corners governs the swing clearance the head needs — both worth checking when the screw sits near adjacent hardware.
Proper selection starts with thread size and screw length, then wrench access: available clearance for the head's across-corners swing, the mating material, the holding action required, and whether surface marking at the contact point is acceptable. Individual product pages list verified thread size, screw length, nominal body diameter, and square head dimensions per ANSI/ASME B18.6.2 to give engineers and purchasing professionals the numbers they need to specify with confidence.
Cold Headers supplies cup point square head set screws in a broad range of inch thread sizes and lengths, including standard, uncommon, and difficult-to-source configurations. Our catalog is organized to simplify exact-size sourcing while providing consistent engineering information across every product family.
Begin by confirming the required thread size and screw length. Review the square head dimensions against available wrench clearance — flats for wrench size, corners for swing — then consider the mating material, the required holding action, and acceptable surface marking. Cup point square head set screws should not be substituted automatically for flat point, cone point, oval point, dog point, or knurled cup point designs, because each point geometry provides different contact characteristics.
Cold Headers Inc. has supplied specialty industrial fasteners since 1962. Our catalog helps engineers, distributors, maintenance teams, and purchasing professionals locate exact sizes, uncommon lengths, and difficult-to-find square head set screws without unsupported inventory claims.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Square head set screws are externally driven threaded fasteners designed to secure collars, pulleys, gears, couplings, hubs, levers, adjustment mechanisms, and other shaft-mounted components. The square head provides wrench engagement for installation and removal, while a variety of point styles allows the fastener to be selected for specific holding and positioning requirements across industrial mechanical assemblies.
Cold Headers supplies square head set screws in multiple point configurations, including half dog point, full dog point, flat point, cone point, and oval point styles. Each point geometry is intended for a different mechanical function, allowing engineers and maintenance professionals to select the appropriate fastener for positioning, adjustment, or shaft engagement requirements. Cup point square head set screws are stocked as a separate dedicated family.
These fasteners are dimensioned to ANSI/ASME B18.6.2, which defines the full square head geometry: a true square head with controlled width across flats and width across corners, specified head height, a crowned top with a defined head radius, and a relieved neck below the head. The width across flats governs wrench size; the width across corners governs the swing clearance the head needs — both worth checking when the screw sits near adjacent hardware.
Specified for demanding industrial service, square head set screws are commonly used in machinery, power transmission equipment, agricultural equipment, industrial maintenance, conveyors, machine tools, pumps, valves, adjustment mechanisms, tooling, and OEM manufacturing.
Proper fastener selection should consider thread size, screw length, point style, wrench accessibility, mating material, installation clearance, and service conditions. Individual product pages provide verified engineering dimensions per ANSI/ASME B18.6.2 to assist engineers and purchasing professionals in selecting the appropriate square head set screw.
Cold Headers supplies square head set screws in a broad range of inch thread sizes and lengths, including standard, uncommon, and difficult-to-source configurations. Our catalog is organized to simplify exact-size sourcing while providing consistent engineering information across every product family.
Begin by confirming the required thread size and screw length. Review the required point style, mating material, installation clearance, and operating environment before selecting a fastener. The selected point geometry should reflect the mechanical requirements of the completed assembly, as each point style serves a different functional purpose.
Cold Headers Inc. has supplied specialty industrial fasteners since 1962. Our catalog helps engineers, distributors, maintenance professionals, and purchasing teams locate exact sizes, uncommon lengths, and difficult-to-find square head set screws without unsupported inventory claims.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
