Solid Brass Slotted Pan Head Machine Screws — M2.5 M3 M4 M5 M6 M8 M10

A general rule of thumb is to select a length that allows the screw to penetrate the base material by at least twice the screw diameter. For example, an M4 screw should typically engage at least 8mm into the receiving material. The length listed here does not include the pan head — factor in your full material stack-up. Quick reference: 10mm ≈ 3/8", 16mm ≈ 5/8", 20mm ≈ 25/32", 25mm ≈ 1".

Brass is generally softer than steel, making these screws well-suited for light-to-medium duty applications. Typical tensile strength for brass fasteners is around 350–500 MPa depending on alloy composition. For heavy structural or high-vibration loads, a steel fastener is typically recommended. Contact us to confirm specifications for your specific application.

Solid brass offers good natural corrosion resistance and does not rust like steel, making it generally suitable for outdoor and mildly marine environments. It is a popular choice for decorative outdoor woodworking, boat trim, and light marine hardware. In highly saline or chemically aggressive environments, stainless steel fasteners are typically a more durable option.

These screws follow the ISO metric thread standard (M-series). They are compatible with standard metric nuts, threaded inserts, and tapped holes of the corresponding size. They are not compatible with UNC or UNF imperial threads. If your existing hardware is metric (e.g., M4, M6), these will fit. If it is imperial (e.g., #8-32, 1/4"-20), you will need a different fastener.

You need a flat-head (slotted) screwdriver. Match the blade width to the screw slot — a blade that is too wide can damage surrounding material, and one that is too narrow can slip and strip the slot. For M2.5–M3, a small precision flat-head is typically used. For M6–M10, a standard flat-head driver is appropriate. Applying steady downward pressure while turning helps prevent cam-out.

Yes — machine screws are designed to thread into a pre-tapped hole or pair with a nut. They work well in hardwood (with a threaded insert or nut), plastic enclosures, thin sheet metal, and electronic 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 and a pilot or tapped hole in the receiving material.

Choose based on the tapped hole or nut size in your application. M2.5–M3 are typically used in electronics, small enclosures, and precision instruments. M4–M5 are common in light mechanical assemblies, furniture hardware, and hobby projects. M6–M10 are used in heavier structural connections, automotive trim, and industrial fixtures. When in doubt, check the thread pitch of your existing hardware or measure the hole diameter with a caliper.

Brass offers a warm, polished aesthetic that zinc-plated steel cannot match, and it is easier to machine and work with than stainless steel. It is non-magnetic, which matters in some electronics applications. Brass is generally more corrosion-resistant than zinc-plated steel but less so than 316 stainless in harsh marine environments. It is the go-to choice when appearance, workability, and moderate corrosion resistance all matter.