4-40 X 3/16″ Machine Screws Undercut Flat Head Slotted Drive 18/8 Stainless Steel (5000/Pkg.) Crafted

Machine Screws Slotted Undercut Flat 18/8 Stainless 4-40 X 3/16 are precision-engineered fasteners designed for secure, flush seating in metal-to-metal assemblies, electronics enclosures, and cabinetry. Crafted from 18/8 stainless steel, these screws combine strength, corrosion resistance, and a reliable slotted drive for easy installation.

Product Overview

Designed for a flush, low-profile fit, the undercut flat head sits securely in countersunk holes while the slotted drive allows straightforward hand or machine installation. The 4-40 thread size and 3/16 inch length are ideal for thinner panels and delicate assemblies where precision matters.

Key Features

Material: 18/8 stainless steel (304) for excellent corrosion resistance and durability.

Drive: Slotted head for compatibility with common screwdrivers and bit drivers.

Head style: Undercut flat head provides a flush, strong seating with reduced protrusion.

Thread and size: 4-40 thread, 3/16 inch length sufficient for light-duty, precise fastening.

Finishing: Plain, corrosion-resistant surface suitable for indoor and outdoor environments.

Specifications

Thread size: 4-40

Length: 3/16 inch

Material: 18/8 stainless steel (304)

Head type: Undercut flat head

Drive: Slotted

Applications

Ideal for electronics housings, appliance assemblies, metal furniture, cabinetry, and light-duty machinery where a clean, flush appearance and reliable fastener performance are required.

Why 18/8 Stainless

18/8 stainless steel offers superior corrosion resistance, good strength, and a smooth, bright finish that resists staining. It’s a versatile choice for environments that demand longevity and easy maintenance.

Care and Maintenance

Periodically inspect fasteners for signs of wear or stripping. Use the correct screwdriver to avoid slippage, and avoid overtightening to preserve the stainless steel’s integrity.