Value Collection R50000233 Machine Screw 5/16-18 Unc 4 in

Product Description

The VALUE COLLECTION R50000233 is a slotted round head machine screw designed for general-purpose fastening in mechanical, electrical, and HVAC applications. It features a 5/16-18 UNC thread and a 4-inch length under head, making it suitable for applications requiring a longer fastener with a standard coarse thread pitch. The screw is manufactured from alloy steel with a zinc-plated finish that provides basic corrosion resistance for indoor and light-duty environments. Installation requires a standard flat-blade screwdriver or slotted bit driver. No washer is included or integrated into this fastener.

This machine screw is commonly used in equipment assembly, panel mounting, bracket attachment, and component fastening across HVAC, electrical, and plumbing trades. The 5/16-18 UNC thread is a widely used coarse thread standard, compatible with standard UNC tapped holes and hex nuts of the same thread designation. It is sold in minimum order quantities and is suited for both field repair and shop assembly work where a round head profile is required to avoid countersinking.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes and hardware
• 4-inch length under head suits deeper fastening applications
• Slotted drive accepts standard flat-blade screwdrivers and bits
• Round head profile eliminates need for countersunk or recessed mounting surfaces
• Alloy steel construction provides strength for mechanical fastening tasks
• Zinc-plated finish offers basic corrosion resistance for indoor use

Compatibility

Designed as a standard 5/16-18 UNC machine screw for use in any application requiring a coarse-thread fastener of this thread size and length. Compatible with standard UNC hex nuts, coupling nuts, and tapped holes of the same thread designation.

Installation Notes

Installation is performed with a flat-blade screwdriver or slotted power bit of the appropriate tip size. Ensure the mating tapped hole or nut is also 5/16-18 UNC before driving the fastener. Apply appropriate torque for the joint material to avoid stripping the slotted drive or damaging the mating thread. Follow applicable equipment manufacturer guidelines and relevant trade codes when using fasteners in structural or load-bearing assemblies.