10PCS 304 Stainless Steel Round Head Hex Hollow Screws M2–M6

JARBLUE Stainless Steel 304 Round Head Hexagon Hollow Screws

Upgrade your hardware projects with these precision-engineered 304 Stainless Steel Round Head Hexagon Hollow Screws by JARBLUE. Available in a wide range of metric sizes (M2 through M10+), these hollow bolts are built to DIN 7380 standard and feature a hex socket drive for easy, secure fastening. Perfect for machine assemblies, DIY builds, electronics enclosures, mask frames, and more.

Key Features

• Premium Material: Made from 304 stainless steel for excellent corrosion resistance and long-lasting durability.
• DIN 7380 Standard: Manufactured to meet international engineering standards for reliable performance.
• Hex Socket Drive: Round head with an internal hex socket for precise, high-torque fastening.
• Hollow Design: Lightweight bolt design ideal for applications requiring cable routing, pin insertion, or weight reduction.
• Wide Size Range: Available in M2, M2.5, M3, M4, M5, M6, M8, M10 — thread lengths from 3mm to 50mm.
• Pack of 10 or 20: Value-packed quantities to keep your workshop stocked.

Specifications

Size Guide

Sizes are listed as Diameter × Thread Length — e.g., M6×30 means a 6mm thread diameter and 30mm thread length (head height not included).

Ideal Applications

• Machine assemblies and mechanical engineering projects
• Electronics enclosures and panel mounting
• DIY fabrication, robotics, and 3D printer builds
• Mask frames and lightweight structural connections
• Any application requiring a hollow-core fastener

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Frequently Asked Questions

Q: What sizes are available for these hollow hex screws?

A: These JARBLUE hollow hex screws are available in M2, M2.5, M3, M4, M5, M6, M8, M10, and M12 metric thread diameters, with thread lengths ranging from 3mm to 50mm depending on the selected size.

Q: Are these hollow screws suitable for outdoor or corrosion-prone environments?

A: Yes! Constructed from 304 stainless steel, these screws offer strong resistance to rust, oxidation, and general corrosion, making them well-suited for both indoor and moderately exposed outdoor applications.

Q: What tool do I need to install these screws?

A: These screws use a hex socket (Allen key / hex wrench) drive. Simply select the appropriately sized hex key matching your screw's drive dimension for secure installation.

Q: What is the difference between a hollow bolt and a standard bolt?

A: A hollow bolt features a through-hole running along its central axis. This design is used for applications that require cable or wire routing through the fastener, pin insertion, fluid passage, or weight reduction — making them versatile for specialized engineering and DIY builds.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.