Hexagon bars, especially in stainless steel, offer uniform strength, precise dimensions, and reliable machining for fabrication, tooling, and DIY projects. This guide highlights five suitable hex bar options, including stainless choices and a couple of compatible steel variants for comparison. Each entry covers material, dimensions, and key features to help you choose the right bar for your needs, whether you’re building machinery mounts, fixtures, or custom hardware.
| Product | Material | Size / Length | Brand |
|---|---|---|---|
| 0.625 (5/8″) x 43″ Hex Bar | 303 Stainless Steel | Across Flats 0.625″ (5/8″) x 43″ | Online Metal Supply |
| 1-1/8″ Hex Bar (12L14 Steel) | Steel | 1.125″ Across Flats, Varies | Generic |
| 1-1/8″ Hex Bar (12″ Length, Steel) | Steel | 1.125″ Across Flats, 12″ Length | Generic |
| 1/2″ Hex Rod Bar (304 Stainless) | 304 Stainless | 1/2″ Across Flats, 250mm | Feelers |
| 0.375″ Hex Bar (303 Stainless) | 303 Stainless | Across Flats 0.375″, 24″ Length | Online Metals |
0.625″ Hex Bar, 43″ Long, 303 Stainless
The 0.625″ hex bar from Online Metal Supply is a long-format piece designed for projects requiring extended length and consistent cross-section. Made from alloy 303 stainless steel, this bar balances machinability with corrosion resistance. The 0.625″ across flats dimension is common for fixtures, jigs, and CNC setups, enabling reliable clamping and repeatable machining. The extended 43″ length supports fabrication work without frequent re-cutting, reducing setup time in shop environments. It is suitable for tasks that demand a stable hex profile and surface finish that accepts polishing or coating as needed.
1-1/8″ Hex Bar (12L14 Steel)
This 1-1/8″ hex bar in 12L14 steel is a versatile choice for applications requiring a robust hex profile with favorable machinability. While not stainless, 12L14 is known for its low hardening and excellent machinability, allowing clean cuts with reduced tool wear. It’s ideal for prototypes, fixtures, or custom components where ease of machining is a priority. Availability in varying lengths makes it adaptable to both small assemblies and longer structural pieces. For critical corrosion-prone environments, consider coatings or protective finishes to extend longevity.
1-1/8″ Hex Bar (12″ Length, Steel)
Another 1-1/8″ hex bar option in steel provides similar machining benefits with a fixed 12″ length. The 12L14 steel construction offers reliable machinability for custom fixtures and short-run components. This size is common for tool positioning and alignment hardware where precise hex geometry improves performance. Users should verify length requirements and handling to ensure the hex block integrates smoothly with existing machining setups or mounting plates. Corrosion resistance is limited compared to stainless options, so environmental protection may be needed.
1/2″ Hex Rod Bar, 304 Stainless
The Feelers 304 stainless hex rod provides corrosion resistance and a burr-free surface suitable for precise assemblies. With a 1/2″ across flats and 250mm length, this hex rod is well-suited for compact fixtures, hardware prototyping, and decorative or functional components requiring a clean stainless profile. The 304 grade is known for ductility and ease of fabrication, making it a practical choice for hobbyists and professionals who need predictable performance in mildly aggressive environments.
0.375″ Hex Bar, 303 Stainless
This smaller 0.375″ hex bar from Online Metals uses 303 stainless steel, offering a balance of machinability and corrosion resistance. With a 24″ length and 0.375″ across flats, it suits compact assemblies, precision fixtures, and small-scale tooling projects. The mill finish is a common baseline for further finishing operations such as polishing or coating. This size is particularly useful for delicate components where space constraints drive the need for a compact hex profile.
Buying Guide: Key Considerations For Hex Bars
Material choice is the primary driver of performance. Stainless steel (such as 304 or 303) offers corrosion resistance and good machinability, making it ideal for wet or humid environments and components that require cleaning. Steel variants like 12L14 provide exceptional machinability and are cost-effective for rapid prototyping and non-corrosive environments, though they need protection in corrosive settings.
Diameter (Across Flats) and length determine compatibility with clamps, fixtures, and tooling. Standard hex sizes (like 1/2″ or 5/8″) align with common collets and v-blocks, while longer lengths reduce the need for re-cutting during fabrication. Check tolerances and finish: mill finish is common, but polished or coated surfaces improve corrosion resistance and aesthetic appeal for high-end applications.
Machinability, workability, and finish play into your project’s tooling strategy. 303 stainless is easier to machine than harder stainless grades, while 12L14 steel machines exceptionally well but lacks inherent corrosion resistance. Consider coatings (e.g., zinc, black oxide) or clear finishes for protection in outdoor or moist environments. Availability of standard lengths versus custom cuts affects lead times.
Cost and lead time are practical factors. Stainless bars tend to be more expensive but offer longer service in corrosive settings. Steel bars may be cheaper and quicker to source, especially for prototypes, but may require post-processing to resist rust. Finally, assess the intended application: fixtures, tooling, or structural components all benefit from a hex profile that remains straight, flat, and within tight tolerances after machining.