#4-40 x 1/2" Flat Countersunk Head Socket Cap Screws, 304 Stainless Steel 18-8 SS, Full Machine Thread Coverage, Allen Hex Drive, 100 PCS

#4-40 x 1/2" Flat Countersunk Head Socket Cap Screws, 304 Stainless Steel 18-8 SS, Full Machine Thread Coverage, Allen Hex Drive, 100 PCS

Key Specs: Thread & Length #4-40 x 1/2"; Head Diameter: 0.2186"~0.255" (5.54-6.48mm); Drive Type: 1/16" Hex Socket; Package: 100 PCS Made of durable 304 stainless steel, offering greater strength and corrosion resistance than zinc-plated or regular steel fasteners. It withstands challenging environments like humidity, temperature variations, and general wear, ensuring long-term reliability with minimal maintenance Secure Hex Socket Drive: The internal hex (Allen) drive provides superior torque transfer compared to Phillips or slotted drives, significantly reducing cam-out and tool slippage. This allows for tighter, more reliable installations and easier removal even after prolonged use The 82-degree (standard) countersunk head is engineered to sit perfectly flush or below the surface in pre-drilled countersink holes. This creates a smooth, unobtrusive finish ideal for machinery, fabrication, automotive work, and DIY projects where a clean profile is required Ideal for Precision Instruments & Small Assemblies: This fine-thread screw is perfect for securing delicate components in optical devices, scientific instruments, small electronics, and model making. The corrosion-resistant 304 stainless steel is ideal for laboratory equipment and medical device housings where material purity and cleanability are essential Achieve a clean, professional finish with these 304 Stainless Steel Countersunk Hex Socket Cap Screws. Engineered for reliability and corrosion resistance, they are the ideal choice for demanding applications where both strength and appearance matter.

Crafted from 18-8 stainless steel, these screws offer superior resistance to rust and corrosion, making them perfect for use in high-humidity, outdoor, and chemical-exposed environments. The 82-degree flat head is designed to sit flush or below the surface in pre-drilled countersink holes, creating a smooth, streamlined profile that eliminates snagging.

The internal hex socket drive allows for higher torque application with minimal risk of cam-out or stripping compared to traditional drives, ensuring secure and reliable installations. Available in a comprehensive range of US sizes from fine-thread #4-40 to heavy-duty 3/8-16, this series is versatile for precision electronics, machinery assembly, automotive modifications, marine hardware, and architectural fabrications.

Choose these professional-grade fasteners for a durable, low-maintenance, and aesthetically pleasing solution in your next project.