1/2" Stainless
Round Bar.
Stocking premium 1/2" (12.7mm) bars with h9 cold-drawn tolerances for superior machinability and corrosion resistance.
Selecting the Right Stainless Grade
Each application of 1/2" round bar demands specific mechanical properties. Compare our stocked grades below.
The industry standard for 1/2" rods. Excellent balance of corrosion resistance and forming capabilities for general components.
Enhanced with Molybdenum. Specifically designed for 1/2" shafts and fasteners used in harsh saltwater or acidic environments.
The "Free-Machining" grade. Best for 1/2" high-volume CNC parts where production speed is the primary priority.
Precipitation hardened. Offers high tensile strength and hardness for 1/2" aerospace and heavy-duty mechanical shafts.
Diametric Tolerance & Finish Control
Cold Drawn (CD)
Commonly used for 1/2" bars. Offers improved yield and tensile strength with a smooth, matte finish. Ideal for general fastener production and structural framing.
Centerless Ground (CG)
Highest precision for 1/2" rods. Delivers extreme straightness and a bright, mirror-like finish. Optimized for high-speed Swiss-style CNC machining and pump shafts.
1/2" Round Bar Tolerance Matrix (ASTM A484)
| Tolerance Class | Diameter Deviation (Inch) | Recommended Application |
|---|---|---|
| h11 (Standard Cold Drawn) | -0.0020" / +0.0000" | Bolts, Brackets, General Support |
| h9 (Precision Ground) | -0.0014" / +0.0000" | Automatic Screw Machining, Shafts |
| h8 (High Precision) | -0.0007" / +0.0000" | Medical Instruments, Aerospace Valves |
The Versatility of 1/2" Round Bar
The 0.500" diameter is more than just a measurement; it is a global engineering benchmark for precision components across multiple industries.
Universal Tooling
The 1/2" diameter is a standard size for most CNC lathes and automatic screw machines. This ensures:
- Fits standard 1/2" collets
- Minimal tool changeover time
- Zero custom bushing costs
Ideal Strength-to-Weight
Provides high torsional rigidity while remaining lightweight enough for high-speed dynamic applications.
- 30% stiffer than 3/8" rods
- Lighter than 5/8" alternatives
- High vibration resistance
Seamless Integration
As a standard fractional size, it integrates perfectly with existing American and international hardware.
- Compatible with 1/2" bearings
- Standard for bushing sleeves
- Ready-to-use threading (1/2-13 UNC)
Where 1/2" Precision Meets Industry
From high-speed manufacturing to mission-critical infrastructure, our 1/2" round bars are the silent backbone of modern engineering.
Precision Components
Ideal for automatic screw machines. Used to produce high-tolerance valve stems, pump shafts, and custom fasteners where 12.7mm is the base dimension.
Maritime Hardware
The standard size for yacht railings, deck hardware, and cleat supports. Resistant to chloride pitting and extreme saltwater exposure.
Food & Beverage
Used as support rods and conveyor axles in food processing lines. Easy to sanitize and strictly compliant with sanitary standards.
Linear Motion Guides
Centerless ground 1/2" rods provide the straightness and surface smoothness required for linear bearings in robotics and 3D printing gantries.