Value Collection W98452PS 4-40 X 5/16 Pan Head Phillips Screw

Product Description

The VALUE COLLECTION W98452PS is a 4-40 x 5/16 inch pan head machine screw with a Phillips drive, manufactured from 18-8 stainless steel to ASME B18.13 standards. Designed for precision fastening in light-duty mechanical assemblies, enclosures, and electrical panels, this screw features an internal tooth washer style for added locking capability under the head. The 5/16 inch length is measured under the head per standard convention. Sold in minimum order quantities of 100 units, this fastener suits production environments, MRO stockrooms, and bench-level assembly work where corrosion resistance and consistent thread engagement are required.

The W98452PS fits applications where a 4-40 unified coarse thread is specified, including instrument housings, control panel assembly, light electronic enclosures, and small appliance fabrication. The pan head profile provides a broad bearing surface suited to through-hole and tapped-hole installations in sheet metal and plastic substrates. Stainless steel construction makes this screw appropriate for environments with moderate moisture exposure where carbon steel fasteners would corrode. This fastener is installed by mechanical assemblers, electricians, and electronics technicians as part of standard fastening practice.

Key Features

• 4-40 unified thread with 5/16 inch length under head for precise fit in tapped assemblies
• 18-8 stainless steel construction provides corrosion resistance in wet or outdoor-adjacent environments
• Pan head profile delivers wide clamping surface and low-profile clearance above the workpiece
• Phillips drive compatible with standard Number 1 Phillips screwdrivers and power drivers
• Internal tooth washer style adds vibration resistance without a separate lock washer
• Manufactured to ASME B18.13 ensuring consistent dimensional and mechanical tolerances

Compatibility

Designed as an OEM-style replacement or standard-stock fastener for any assembly specifying a 4-40 x 5/16 inch pan head Phillips machine screw per ASME B18.13 in inch measurement.

Installation Notes

Install using a Number 1 Phillips screwdriver or a properly sized power driver bit to avoid cam-out and head damage. Ensure mating threads are clean and free of debris before driving. When installing into tapped holes in thin materials, verify thread engagement depth meets the requirements of the applicable assembly standard. Stainless steel fasteners are susceptible to galling during installation — apply an appropriate anti-seize compound when torque consistency is critical.