
Reliable Custom Air Valve Steel Round Bar From 4.5 to 80 mm Diameter. Customizable Dimensions: Diameter from 4.5mm to 80mm with custom lengths available to minimize waste. Custom Heat Treatment: Available annealed, pre-hardened, or custom quenching and tempering to meet specific hardness. Wide Alloy Selection: Multiple alloy compositions available, including 4140, 4340, and other custom grades. High Precision Tolerance: Standard h6/h7 tolerance with tighter h5 options available for high-precision applications. Comprehensive Certification: Includes Mill Test Certificate (MTC) 3.1 with optional chemical analysis reports. Versatile Applications: Ideal for automotive valvetrain, pneumatic tools, compressor valves, and hydraulic systems. Trade Protection Guarantee: Deposit refunded if delivery fails or if received products have quality issues.