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Cast Iron Calibration Weights - Slotted Interlocking and Hanger Weights

  • Slotted weights and hangers for suspended weighing 
  • Nominal value marked on weight
  • Weight capacities of 10 kg/20 lb and up meet NIST Handbook 105-1 and Handbook 44 specifications
  • Metric weights designated by gold paint
  • Avoirdupois weights (pound) designated by silver paint
  • Serial numbers may be stamped on weights (optional)

Our cast iron weights undergo a special phosphatizing process in which the metal is thoroughly cleaned and mildly etched to allow exceptional finish adhesion. The weights are then coated with a layer of chip-resistant paint which conforms to NIST Handbook 105-1 standards. This two-step process ensures a long-lasting finish that greatly reduces the possibility of corrosion. 

Classes Available:


Resources / Downloads

Title View Email Category Type
Class F Calibration Weights No Longer Sold for Legal Metrology Use Starting January 2020 View Email Calibration Weights/Services|Test / Calibration Weights|Calibration Services Articles
How to Pack Your Weights in 5 Steps Email Calibration Weights/Services|Calibration Services Articles
Are All Calibrations The Same? Email Calibration Services|Calibration Weights/Services|Test / Calibration Weights Articles

Title Download Email
Cast Iron Slotted Interlocking and Hanger Calibration Weights Catalog Page Download Email

Title Collateral Wizard Request Download Email Category
Cast Iron Test Weights Request Download Email Test / Calibration Weights
Weights and Calibration Services Request Download Email Calibration Weights/Services|Calibration Weights|Test / Calibration Weights

Title View Download Email Category
Know Your Classification for Accuracy View Email Precision Measurement


ASTM Class 6 Avoirdupois Slotted

Part # Description List Price Cart
12831 Weight,Slotted Interlocking 20lb 8-1/8Dia x 1-7/8H x 3/4 Slot Width ASTM Class 6 Cast Iron Painted

List Price: $103.00

12856 Weight,Slotted Interlocking 50lb 10-1/2Dia x 2-1/2H x 9/16 Slot Width ASTM Class 6 Cast Iron Painted

List Price: $239.00

40828 Weight,Slotted Interlocking 100lb 17Dia x 1-15/16H x 1 Slot Width ASTM Class 6 Cast Iron Painted

List Price: $613.00

ASTM Class 6 Metric Slotted

ASTM Class 7 Avoirdupois Hanger

ASTM Class 7 Avoirdupois Slotted

ASTM Class 7 Metric Hanger

ASTM Class 7 Metric Slotted


Part # Description List Price Cart
36092 Form,Statement of Accuracy

List Price: $47.50

25836 Serial Number

List Price: $17.00

Replacement Parts

Replacement parts can only be purchased through trained and authorized dealers. You must be logged in as a dealer to view any available replacement parts.

To locate a dealer in your area, please call us at 1-800-472-6703 or fill out a request online.

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