Value Collection R52000828 Machine Screw 4-40 X 0.5 in Round Head

Product Description

The VALUE COLLECTION R52000828 is a 4-40 unified coarse-thread machine screw with a round head and slotted drive, manufactured from steel with a zinc-plated finish. The screw measures 0.5 inches in length under the head and conforms to ASME B18.6.3 and SAE J82 dimensional and material standards. Grade J82 steel provides reliable tensile strength for general-purpose fastening in light mechanical assemblies, enclosures, and equipment panels. The zinc coating offers baseline corrosion resistance suitable for indoor and controlled-environment applications. This screw is used by maintenance technicians, assemblers, and field service professionals across HVAC, electrical, and general industrial trades.

The R52000828 is suited for light-duty fastening tasks where a No. 4-40 thread form is specified. Typical applications include securing control boards, terminal covers, sheet metal panels, and small mechanical components inside equipment enclosures. The round head profile seats flush to surrounding surfaces without a washer and is well matched to thin-gauge sheet metal and plastic substrates. This screw is sold in multiples of 100 units per order, making it practical for stocking and repetitive-assembly work on production lines or service benches.

Key Features

• 4-40 unified coarse thread for compatibility with standard tapped holes in light mechanical assemblies
• Round head profile provides a low-profile bearing surface without requiring a separate washer
• Slotted drive accommodates standard flat-blade screwdrivers for simple installation and removal
• Zinc-plated steel finish delivers baseline corrosion resistance in indoor environments
• Meets ASME B18.6.3 and SAE J82 standards for dimensional accuracy and material grade
• Minimum order quantity of 100 units supports stocking for production and service applications

Compatibility

Designed as a standard 4-40 x 0.5-inch round-head slotted machine screw for use in any application specifying a No. 4-40 thread form per ASME B18.6.3.

Installation Notes

Install with a flat-blade screwdriver sized to the slotted drive to avoid cam-out and head damage. Verify that the mating tapped hole or nut conforms to 4-40 thread specification before driving. Do not exceed hand-tight torque in plastic substrates or thin-gauge sheet metal to prevent thread stripping. Power down any electrical equipment before accessing internal fasteners on control boards or panel assemblies.