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)
    11 Products

    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.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    5-0.0005 to 0.00053 3/16"4 7/8"Stainless Steel
    		5ASTM E617 Class 5Calibration Certificate Traceable to NIST1908T750000000

    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.,
    kg
    Wt. Tolerance, kg
    Dia.
    Ht.
    Material
    Specs. Met
    Includes
    Certificate Type
    Each
    Calibration Weight Class 1
    5-0.000012 to 0.0000123 1/4"4 7/8"Stainless Steel
    		ASTM E617 Class 1Glove
    Plastic case    		Calibration Certificate Traceable to NIST17605T640000000
     
    Calibration Weight Class 4
    5-0.0001 to 0.00013 3/16"4 7/8"Stainless Steel
    		ASTM E617 Class 4Glove
    Plastic case    		Calibration Certificate Traceable to NIST17605T113000000
     

    Hanging Test Weights

    Image of Product. Front orientation. Test Weights. Hanging Test Weights.
    The top hook lets you attach these weights 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.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    5-0.0005 to 0.00053 3/4"6 3/8"Stainless Steel
    		6ASTM E617 Class 61914T310000000

    Legal-for-Trade Test Weights

    Image of Product. Front orientation. Test Weights. Legal-for-Trade Test Weights.
    Calibrate legal-for-trade scales. These test weights are marked with their weight.
    Wt.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    5-0.0005 to 0.00053 3/16"4 7/8"Stainless Steel
    		5ASTM E617 Class 51908T650000000

    Hanging Test Weights with Calibration Certificate

    Image of Product. Front orientation. Test Weights. Hanging Test Weights with Calibration Certificate.
    The included certificate of calibration traceable to NIST states that these test weights have 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.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    5-0.0005 to 0.00053 3/4"6 3/8"Stainless Steel
    		6ASTM E617 Class 6Calibration Certificate Traceable to NIST1914T610000000

    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.,
    kg
    Wt. Tolerance, kg
    Dia.
    Ht.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Includes
    Each
    5-0.000012 to 0.0000123 1/4"4 7/8"Stainless Steel
    		1ASTM E617 Class 1Glove
    Plastic case    		17605T440000000

    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.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Slot
    Wd.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Certificate Type
    Each
    5-0.0005 to 0.00056"1 11/16"9/16"Cast Iron6ASTM E617 Class 6Calibration Certificate Traceable to NIST1850T550000000
    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

    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.,
    kg
    Wt. Tolerance,
    kg
    Dia.
    Ht.
    Slot
    Wd.
    Material
    Calibration
    Wt. Class
    Specs. Met
    Each
    5-0.0005 to 0.00056"1 11/16"9/16"Cast Iron6ASTM E617 Class 61850T250000000
    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
    back to top