M1 Iron Calibrated Weights
M1 Cast Iron calibrated test weights are high quality cast iron weights that are cast in sand moulds and knocked out once set. They are then shot blasted for a smooth finish and blasting grounded on the parts the blasting does not remove. The weights are then black etched painted by dipping or spraying for a smooth black matt protected finished. Test weights up to 2kg are hexagonal in shape and 5kg -25kg are bar weights with a handle.
All check weights are calibrated to M1 standards and available with certificate of calibration traceable to National Standards
Click here for full specification of M1 tolerances