Bulk #4-40 UNC Phillips 82° Flat Head Machine Screws (Standard & Undercut UC) Stainless Steel 18-8 (A2)

Corrosion-Resistant, Fine-Threaded Fasteners for Precision Assemblies

Upgrade your electronics, instrumentation, and precision manufacturing projects with our premium #4-40 UNC Phillips Flat Head Machine Screws, available in both standard and undercut (UC) variants. Crafted from 18-8 (A2) stainless steel, these screws provide excellent corrosion resistance, ensuring reliable performance in mildly corrosive environments. The Phillips drive offers straightforward installation, and the 82° flat head design ensures a flush, low-profile finish perfect for delicate applications and tight clearances.

Standard vs. Undercut (UC) Variants

Standard 82° Flat Head: Tapered fully under the head, suitable for typical flush-mount applications where standard countersinks are used.

Undercut (UC) 82° Flat Head: Features a shorter head profile that sits fully flush in shallower countersinks. Perfect for thin materials or hinges where a fully flush connection is crucial, eliminating gaps and ensuring a stable, secure fit.

Key Benefits of Our Stainless Steel Phillips Flat Head Machine Screws

• Corrosion Resistance: 18-8 (A2) stainless steel resists rust, maintaining strength in moist or mildly corrosive conditions.
• Flush, Low-Profile Finish: The 82° flat head design (in both standard and UC) ensures minimal head protrusion.
• Versatile Options: Choose standard or UC variants based on your project's requirements for countersink depth and flushness.
• Easy Installation: Phillips drive allows for quick assembly using common tools.
• Precision Threads: #4-40 coarse threads ensure reliable fastening in small assemblies.

Why Choose Our Bulk Machine Screws?

• Bulk Discounts: Ideal for manufacturers, electronics assembly, and large-scale projects seeking volume pricing.
• Wholesale Availability: Perfect for B2B customers needing substantial quantities over time.
• Quality Material: 18-8 stainless steel ensures long-lasting corrosion resistance and dependable strength.
• Flexible Options: Standard or UC variants cater to a wide range of flush-mount requirements, including hinges and thin materials.

Product Specifications

• Screw Size: #4-40 UNC
• Drive Type: Phillips
• Head Style: 82° Flat Head (Standard & Undercut UC variants)
• Material: 18-8 (A2) Stainless Steel
• Thread Type: Coarse Threads (#4-40)
• Standards Compliance: Meets common industry standards for machine screws

Ideal Applications

• Door Hinges (UC Variant): Undercut screws ensure a fully flush, stable mount in shallow countersinks.
• Electronics and Instruments: Perfect for small electronic devices, sensors, and precision instruments requiring minimal head protrusion.
• Appliances and Devices: Ideal for fastening components in appliances and other compact equipment.
• Machinery and Tools: Suitable for attaching thin metal plates, brackets, and other small parts where corrosion resistance and a flush finish matter.

Buy in Bulk and Build with Confidence

Choose our #4-40 UNC Phillips 82° Flat Head Machine Screws in standard or undercut (UC) variants for secure, corrosion-resistant connections in delicate and precision assemblies. With bulk and wholesale pricing, Monster Bolts provides top-quality stainless steel fasteners tailored to your project's needs. Opt for the UC variant when a fully flush, secure fit is crucial—such as attaching door hinges or working with thin materials—and enjoy a cleaner, more stable connection.

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