McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    13 Products

    Test Weights with Calibration Certificate

    Image of Product. Front orientation. Test Weights. Test Weights with Calibration Certificate.
    These test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They’re used to calibrate scales. All are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    500-0.3 to 0.31 5/8"2 1/4"Stainless Steel
    		7ASTM E617 Class 7Calibration Certificate Traceable to NIST1777T190000000

    Test Weights

    Image of Product. Front orientation. Test Weights. Test Weights.
    Calibrate scales with confidence using stainless steel test weights that resist corrosion and stay dimensionally stable over time. They'll provide consistent readings across repeated calibrations thanks to their tight ASTM E617 Class 7 tolerances. Each weight is marked for quick identification.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    500-0.3 to 0.31 5/8"2 1/4"Stainless Steel
    		7ASTM E617 Class 71777T29000000

    Legal-for-Trade Test Weights with Calibration Certificate

    Image of Product. Front orientation. Test Weights. Legal-for-Trade Test Weights with Calibration Certificate.
    To ensure accurate calibration of legal-for-trade scales, these test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    500-0.07 to 0.071 1/2"2 3/8"Stainless Steel
    		5ASTM E617 Class 5Calibration Certificate Traceable to NIST1908T940000000

    Interlocking Test Weights

    Image of Product. Shown with Optional Hanger. Front orientation. Test Weights. Interlocking Test Weights.

    Shown with

    Optional

    Hanger

    Stack multiple grooved weights together to calibrate your scales. Weights are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Slot
    Wd.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    500-0.05 to 0.055"5/16"9/16"Cast Iron6ASTM E617 Class 61850T22000000
    Scale Weight Hangers
    Image of Product. Front orientation. Contains Annotated. Scale Weight Hangers. Interlocking Test Weights.
    Hangers let you test and calibrate hanging scales.
    Wt. Cap.,
    kg
    Dia.
    Ht.
    Wt.,
    kg
    Each
    753 3/4"9 1/4"11850T510000000

    Precision Test Weights with Calibration Certificate

    Image of Product. Front orientation. Test Weights. Precision Test Weights with Calibration Certificate, Calibration Weight Class 1.
    Image of Product. Bottom orientation. Test Weights. Precision Test Weights with Calibration Certificate, Calibration Weight Class 4.

    Calibration

    Weight Class

    1

    Calibration

    Weight Class 4

    Often used to calibrate precision scales, these highly accurate test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They are marked with their weight.
    Calibration Weight Class 1—Class 1 weights are highly accurate and used as a reference standard for calibrating other calibration weights. They are also good for calibration of microbalances and analytical balances.
    Calibration Weight Class 4—Class 4 weights are good for calibrating precision balances, laboratory balances, and digital scales.
    Wt.,
    g
    Wt. Tolerance, g
    Dia.
    Ht.
    Material
    Specs. Met
    Includes
    Certificate Type
    Each
    Calibration Weight Class 1
    500-0.0012 to 0.00121 1/2"2 5/16"Stainless Steel
    		ASTM E617 Class 1Glove
    Plastic case    		Calibration Certificate Traceable to NIST17605T290000000
     
    Calibration Weight Class 4
    500-0.01 to 0.011 1/2"2 5/16"Stainless Steel
    		ASTM E617 Class 4Glove
    Plastic case    		Calibration Certificate Traceable to NIST17605T109000000
     

    Precision Test Weights

    Image of Product. 30 g to 500 g. Front orientation. Test Weights. Precision Test Weights.
    Image of Product. 1,000 g to 5 kg. Front orientation. Test Weights. Precision Test Weights.

    30 g to

    500 g

    1,000 g to 5

    kg

    Our most accurate test weights, these are often used to calibrate precision scales. They are marked with their weight.
    Wt.,
    g
    Wt. Tolerance, g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Includes
    Each
    500-0.0012 to 0.00121 1/2"2 5/16"Stainless Steel
    		1ASTM E617 Class 1Glove
    Plastic case    		17605T390000000

    Legal-for-Trade Hanging Test Weights with Calibration Certificate

    Image of Product. Front orientation. Test Weights. Legal-for-Trade Hanging Test Weights with Calibration Certificate.
    To ensure reliable calibration of legal-for-trade scales, these test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. The top hook lets you attach them to hanging scales, and the bottom hook lets you connect multiple weights in a series. The bottom hook can also retract into the weight for use with bench-top scales. Weights are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    500-0.07 to 0.071 3/4"4 1/4"Stainless Steel
    		5ASTM E617 Class 5Calibration Certificate Traceable to NIST1914T670000000

    Legal-for-Trade Test Weights

    Image of Product. Front orientation. Test Weights. Legal-for-Trade Test Weights.
    Accepted by weights and measures authorities, these test weights calibrate legal-for-trade scales used in regulated commercial transactions. They meet ASTM E617 Class 5 accuracy standards. Made of stainless steel, they resist corrosion to maintain accuracy over time. Each weight is marked for easy identification during audits and traceability documentation.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    500-0.07 to 0.071 1/2"2 3/8"Stainless Steel
    		5ASTM E617 Class 51908T54000000

    Legal-for-Trade Hanging Test Weights

    Image of Product. Front orientation. Test Weights. Legal-for-Trade Hanging Test Weights.
    Designed for calibrating legal-for-trade scales, these weights have a top hook for attaching to hanging scales and a bottom hook for connecting multiple weights in a series. The bottom hook can also retract into the weight for use with bench-top scales. Weights are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    500-0.07 to 0.071 3/4"4 1/4"Stainless Steel
    		5ASTM E617 Class 51914T370000000

    Interlocking Test Weights with Calibration Certificate

    Image of Product. Shown with Optional Hanger. Front orientation. Test Weights. Interlocking Test Weights with Calibration Certificate.

    Shown with

    Optional

    Hanger

    These test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. Stack multiple weights together to calibrate your scales. Weights are marked with their weight.
    Wt.,
    g
    Wt. Tolerance,
    g
    Dia.
    Ht.
    Slot
    Wd.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    500-0.05 to 0.055"5/16"9/16"Cast Iron6ASTM E617 Class 6Calibration Certificate Traceable to NIST1850T520000000
    Scale Weight Hangers
    Image of Product. Front orientation. Contains Annotated. Scale Weight Hangers. Interlocking Test Weights with Calibration Certificate.
    Wt. Cap.,
    kg
    Dia.
    Ht.
    Wt.,
    kg
    Each
    753 3/4"9 1/4"11850T710000000
    back to top