1 lb Weight – ASTM Class 5 Stainless Steel Test Weight
 
This 1 lb calibration weight is engineered for precision, performance, and long-lasting durability. Whether you're performing routine scale checks, field calibrations, or equipment verification, this weight is the ideal solution. Made from high-quality stainless steel and crafted to ASTM Class 5 tolerances, it's perfect for calibrating non-classified scales and Class III field devices with confidence.
 
Designed to meet the stringent requirements of NIST Handbook 44 and ASTM E617-23, this 1 lb weight ensures consistent accuracy in a variety of environments. Its smooth, corrosion-resistant surface makes it easy to handle and clean, while the clearly marked nominal value allows for quick identification during use.
 
A sealing cavity is included for future adjustments, and you also have the option to add a stamped serial number for traceability—ideal for labs and facilities with strict quality control processes.
Whether you're building your own test weight kit or replacing worn weights, this 1 lb test weight delivers the reliability professionals depend on.