M6 Phillips Pan Head Machine Screws — 304 Stainless Steel, 6mm to 100mm

Select a length that allows the screw to pass through the top material and engage the nut or tapped hole by at least 1× the thread diameter (6mm for M6). For example, if your material stack is 10mm thick and you're using a nut, a 16mm (5/8") screw is typically a good starting point. Quick reference: 6mm ≈ 1/4", 12mm ≈ 1/2", 20mm ≈ 25/32", 30mm ≈ 1-3/16", 50mm ≈ 2", 100mm ≈ 3-15/16".

304 stainless steel fasteners generally have a tensile strength of around 500–700 MPa, making them suitable for light-to-medium duty structural and mechanical applications. They are stronger than brass but generally not as strong as hardened carbon steel grade 8 or 10.9 bolts. For high-load or high-vibration applications, confirm the required grade with an engineer before specifying.

304 stainless steel offers good corrosion resistance and is suitable for most outdoor environments, including exposure to moisture, humidity, and light weather. It is generally not recommended for direct saltwater immersion or highly chlorinated environments — 316 stainless steel is typically preferred for those conditions. For outdoor furniture, garden hardware, and general exterior use, 304 stainless is a reliable and widely used choice.

These are M6 metric machine screws following the ISO metric thread standard with a standard pitch of 1.0mm. They are compatible with M6 metric nuts, threaded inserts, and tapped holes. They are not compatible with UNC or UNF imperial threads. If your existing hardware is metric M6, these will fit. If it is imperial (e.g., 1/4"-20), you will need a different fastener.

You need a Phillips (cross-head) screwdriver. For M6 screws, a #2 Phillips driver is typically the correct size. Using an undersized bit can strip the recess, so match the driver carefully. A power driver with a clutch setting is recommended for production use to avoid overtightening and head damage. Apply firm downward pressure while driving to prevent cam-out.

Yes — machine screws are designed to thread into a pre-tapped hole or pair with a nut. They work well in metal brackets, plastic enclosures, wood with threaded inserts, and general mechanical assemblies. For driving directly into wood without a nut or insert, a wood screw or self-tapping screw is generally more appropriate. Always pre-drill a clearance hole in the top material.

304 stainless steel provides inherent corrosion resistance throughout the entire fastener — not just a surface coating that can chip or wear off over time. Unlike zinc-plated screws, 304 stainless will not rust through if the surface is scratched. It also has a cleaner, more polished appearance and is generally low-magnetic, which matters in some electronics or sensitive equipment applications.

Order 10 pcs for small repairs or one-off projects where you only need a handful of fasteners. Choose 50 pcs if you're working on a medium-sized build or want a backup supply on hand. The 100-piece pack offers the lowest per-unit cost and is ideal for workshops, production runs, or anyone who regularly works with M6 hardware and wants to avoid running out mid-project.