Round Head

Round head machine screws are threaded fasteners used to assemble components with pre-tapped holes or matching nuts. They are suited to commercial and industrial equipment, hardware, and general assembly work where a rounded head profile and a specified 1/4-20 thread are required.

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Helpful Buying Guide

Round Head Machine Screw Buying Guide

Choose a round head machine screw by matching its thread, length, drive style, and finish to the assembly requirement. The available options use 1/4-20 threads and are designed for use with compatible threaded holes or nuts.

Visual Guide

Popular examples in this category

1/4-20 x 1/2 in. Slotted Round Head Steel Machine Screw1/4-20 x 1/2 in. Slotted Round Head Steel Machine ScrewWBB22121611/4-20 x 3/4 in. Phillips Round Head Fully Threaded Machine Screw, Black Oxide1/4-20 x 3/4 in. Phillips Round Head Fully Threaded Machine Screw, Black OxideWBB416565
Use Cases

Fasten threaded assemblies

Round head machine screws are used for equipment, hardware, and general assembly work involving a pre-tapped hole or a matching nut.

How to Choose

Match the fastening details

Confirm that the application accepts a 1/4-20 thread, then select the needed screw length and a slotted or Phillips drive that works with the intended installation tool.

Applications

Support commercial assembly work

These screws fit component-assembly and fastening tasks where a smooth, rounded finished head appearance is desired.

Additional Information

Compare finish and threading

The represented choices include zinc-plated steel and black oxide finishes. One option has a fully threaded shank that engages mating threads along the screw length.

1/4-20Thread size

Both represented screws fit compatible 1/4-20 threaded holes and nuts.

2Length options

Compare 1/2-inch and 3/4-inch machine screw lengths.

2Drive styles

Choose from slotted and Phillips drive options.

1Minimum order

Each represented option lists a minimum order quantity of 1.

Comparison Guide

Compare Represented Round Head Machine Screw Types

Use this comparison to distinguish the listed screw lengths, drive styles, and construction details.

OptionKey detailsBest fit
Slotted round head steel machine screw1/4-20 thread; 1/2-inch length; zinc-plated steel; slotted driveAssemblies needing a compact 1/2-inch screw with a slotted round head
Phillips round head fully threaded machine screw1/4-20 thread; 3/4-inch length; black oxide; Phillips drive; fully threaded shankAssemblies specified for a 3/4-inch Phillips-drive screw with threading along the length
Shared category considerationsRound head profile; use with compatible pre-tapped holes or matching nuts; minimum order of 1Commercial and industrial component, hardware, and general assembly work
Planning Guide

Plan the right fit before choosing

Start With Thread Compatibility

Verify the 1/4-20 thread requirement

Both represented machine screws use a 1/4-20 thread. Select this category when the component has a compatible 1/4-20 pre-tapped hole or when the assembly uses a matching nut.

  • Match the screw to a 1/4-20 threaded hole or nut.
  • Use machine screws for threaded component assembly.
  • Confirm thread compatibility before comparing other details.
Choose Length and Drive

Select the dimensions and installation style your assembly needs

The available lengths are 1/2 inch and 3/4 inch. Drive options include a slotted round head and a Phillips round head, so the appropriate choice depends on the specified screw length and compatible installation driver.

  • Choose 1/2 inch when a compact, short machine screw is needed.
  • Choose 3/4 inch for assemblies requiring that defined length.
  • Use a compatible slotted or Phillips driver for installation.
Review Head, Finish, and Threading

Compare the visible profile and construction details

A round head provides a rounded surface and finished appearance. The listed options include zinc-plated steel and black oxide finishes, while the 3/4-inch Phillips option is fully threaded for engagement along the screw length.

  • Round heads provide a smooth, rounded profile.
  • Compare zinc-plated steel with black oxide based on the specified fastener requirement.
  • Consider a fully threaded shank when thread engagement along the screw length is needed.
FAQ

Common questions before buying

What thread size do these round head machine screws use?

The represented screws use a 1/4-20 thread for compatible 1/4-20 threaded holes or matching nuts.

What lengths are represented in this category?

The listed options are 1/2 inch and 3/4 inch long.

Which drive styles are available?

The represented options include slotted and Phillips drives.

Are all listed screws fully threaded?

The 3/4-inch Phillips round head machine screw is described as fully threaded. The supplied details do not identify the 1/2-inch slotted option as fully threaded.

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