Value Collection R52000308 Machine Screw 4-40 X 1/2 in Brass

Product Description

The VALUE COLLECTION R52000308 is a 4-40 x 1/2 inch brass machine screw with a round head and slotted drive. Conforming to ASME B18.6.3, this fastener is designed for use in precision assembly applications where consistent thread form and dimensional accuracy are required. The round head profile provides a low-profile, finished appearance on visible surfaces. The slotted drive accepts standard flat-blade screwdrivers, making it a straightforward choice for panel assembly, instrument enclosures, and light mechanical fabrication. Brass construction offers natural corrosion resistance and non-magnetic properties suited to electrical and electronic work.

This screw is commonly used in light-duty mechanical and electrical assembly, including control panel fabrication, electronic enclosures, instrument mounting, and small appliance repair. The 4-40 thread size is one of the most common small-fastener specifications in North American trade and electronics work. Length is measured under the head at 1/2 inch, per the ASME B18.6.3 standard. This SKU is sold in multiples of 100, with a package quantity of 1 unit per order line.

Key Features

• 4-40 unified coarse thread for reliable engagement in standard tapped holes
• Round head profile provides a clean, finished look on exposed surfaces
• Slotted drive compatible with standard flat-blade screwdrivers
• Brass material offers corrosion resistance and non-magnetic properties
• Meets ASME B18.6.3 dimensional and tolerance standards
• 1/2 inch length measured under head for consistent installation depth

Compatibility

Designed as an OEM-style replacement or service fastener for any application requiring a 4-40 x 1/2 inch round head slotted machine screw conforming to ASME B18.6.3.

Installation Notes

Installation is performed by hand or with a flat-blade screwdriver sized to fit the slotted head. Ensure the receiving material contains a properly tapped 4-40 thread before driving the screw to avoid cross-threading or stripping. Do not over-torque brass fasteners, as the material is softer than steel and susceptible to shear or thread damage under excessive force. Follow applicable assembly specifications for the host equipment when torque values are required.