Value Collection R52000306 4-40 X 1/4 in Round Head Slotted Brass

Product Description

The VALUE COLLECTION R52000306 is a 4-40 x 1/4 inch round head slotted machine screw manufactured from brass. This fastener features a fully threaded shank measured under the head at 1/4 inch, with a 4-40 UNC thread form suited for fine-threaded assemblies in light-duty applications. The round head profile provides a low-profile dome shape that sits above the surface, and the slotted drive accepts a standard flat-tip screwdriver. Brass construction offers natural corrosion resistance and electrical non-conductivity, making this screw a common choice in electrical enclosures, plumbing fixtures, and instrumentation panels. This fastener meets ASME B18.6.3 dimensional standards.

This machine screw is used in residential and commercial applications where a small-diameter, fine-thread fastener is required. Typical install scenarios include securing terminal blocks, light electrical components, instrumentation housings, and brass fittings. The 4-40 thread size is standard in low-voltage control wiring enclosures and small equipment assemblies encountered by electricians and instrumentation technicians. No washer is included or required under the head per the standard configuration.

Key Features

• 4-40 UNC thread size for fine-threaded, light-duty fastening applications
• 1/4 inch length measured under the head per ASME B18.6.3
• Round head profile with slotted drive for standard flat-tip screwdriver installation
• Brass material provides corrosion resistance and electrical non-conductivity
• No washer configuration per ASME B18.6.3 standard
• Sold in multiples of 100 units per order

Compatibility

Designed as a standard 4-40 x 1/4 inch round head slotted machine screw for use in any application requiring an inch-system fastener meeting ASME B18.6.3 dimensional requirements.

Installation Notes

Installation is performed with a flat-tip screwdriver sized to the slotted drive. De-energize any electrical assembly before installing or removing fasteners in live panels or control enclosures, following applicable NEC guidelines. Do not overtighten brass fasteners, as the material is softer than steel and susceptible to thread stripping under excessive torque. Verify that the mating thread in the receiving component matches the 4-40 UNC specification before installation.