M3.5 X 30MM Machine Screw

Key specs include a 3.5 mm diameter (M3.5) and 30 mm length, coarse threading, and a screw head that is typically flat or rounded. The screw is designed as a metal fastener for joining components and is compatible with standard tools for machine screws.

These screws are commonly available in steel, brass, and aluminum. Finish options may include plain, zinc-plated, or other coatings depending on the supplier, providing varying levels of strength and corrosion resistance.

To install, align the screw with the mating hole or nut, start threading by hand to avoid cross-threading, and then tighten with the appropriate driver (screwdriver or hex/Allen driver) that matches the screw head. Use a nut or tapped hole for through-hole assemblies and avoid overtightening to prevent material damage.

Common use cases include attaching metal parts to metal, securing components in mechanical assemblies, assembling lightweight structural elements in hobby projects, and performing mechanical repairs where a precise, small-diameter fastener is needed.

Head types for M3.5 x 30mm screws typically include flat (pan/flat head variants) or rounded heads, depending on the product line. The threading is usually coarse, designed for strong engagement in a variety of materials.

Choose length based on the thickness of the materials being joined plus any nuts or tapped holes. If joining through all parts, a longer length ensures full engagement, while shorter lengths are better for through-holes with a nut on the opposite side. Select a head type that sits flush or mirrors the desired appearance and seating requirement.

Material choice affects performance and corrosion resistance. Steel screws are strong, brass offers corrosion resistance in some environments, and aluminum provides lightweight strength. For harsher environments, look for stainless steel variants (if available on Fepy) or coated finishes to improve durability.

Store them in a dry, organized container away from moisture to prevent corrosion. Keep different sizes separate and clearly labeled. Use protective caps or resealable bags for bulk packs to maintain their condition over time.

Compared options include: - M3.5 x 20mm machine screw: https://fepy.com/product/m3-5-x-20mm-machine-screw - M3.5 x 40mm machine screw: https://fepy.com/product/m3-5-x-40mm-machine-screw - M3.5 x 30mm stainless steel machine screw: https://fepy.com/product/m3-5-x-30mm-stainless-steel-machine-screw - M4 x 30mm machine screw (slightly larger diameter): https://fepy.com/product/m4-x-30mm-machine-screw These alternatives differ mainly in length, diameter, or material, affecting fit, strength, and corrosion resistance for various applications.

Value is influenced by material quality (steel, brass, aluminum), finish/coatings (zinc, stainless variants), packaging quantity, price per piece, and whether a matching nut or tapped hole is needed. Considering these factors helps you choose the right screw for your project and budget.

Tip 1: verify the hole diameter and thread engagement before full tightening. Tip 2: start threading by hand to avoid cross-threading. Tip 3: use the correct driver for your screw head and avoid over-tightening. Tip 4: if joining soft materials, consider using a nut or tapped hole to ensure secure fastening. Tip 5: keep a small selection of commonly used sizes on hand for quick assemblies.