Counterpoise and Hanger Calibration Weight, ASTM Class 7

As of: Friday, July 11, 2025
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Standard Features

  • Counterpoise weights for ratio 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:

  • ASTM Class 7

Applications:

  • Field standards for testing industrial devices Class III, Class IIlL or IIII
  • Testing for non-marked scales without Class designation
  • Verifying scales are within specified accuracy and tolerances

Parts

Part # Description
ASTM Class 7 Avoirdupois Round
10154 Weight,CP Round Slotted Interlocking 50lb x 1/2lb 2-29/32Dia ASTM Class 7 Cast Iron Painted
10156 Weight,CP Round Slotted Interlocking 100lb x 1lb 4-3/32Dia ASTM Class 7 Cast Iron Painted
10158 Weight,CP Round Slotted Interlocking 200lb x 2lb 4-5/32Dia ASTM Class 7 Cast Iron Painted
10160 Weight,CP Round Slotted Interlocking 500lb x 5lb 3-29/32Dia ASTM Class 7 Cast Iron Painted
10152 Weight,CP Round Slotted Interlocking 100lb x 1/2lb 2-29/32Dia ASTM Class 7 Cast Iron Painted
10168 Weight,CP Round Slotted Interlocking 200lb x 1lb 3-17/32Dia ASTM Class 7 Cast Iron Painted
10189 Weight,CP Round Slotted Interlocking 300lb x 1-1/2lb 3-17/32Dia ASTM Class 7 Cast Iron Painted
10170 Weight,CP Round Slotted Interlocking 500lb x 2-1/2lb 3-17/32Dia ASTM Class 7 Cast Iron Painted
10196 Weight,CP Slotted 1,000lb x 5lb 3-29/32Dia ASTM Class 7 Cast Iron Painted
ASTM Class 7 Metric Hexagon
10266 Weight,CP HEX Slotted 10kg x 100g 2-1/16 ASTM Class 7 Cast Iron Painted
10268 Weight,CP HEX Slotted 25kg x 250g 3-1/4 ASTM Class 7 Cast Iron Painted
10270 Weight,CP HEX Slotted 50kg x 500g 4 ASTM Class 7 Cast Iron Painted
10272 Weight,CP HEX Slotted 100kg x 1kg ASTM Class 7 Cast Iron Painted
10274 Weight,CP HEX Slotted 200kg x 2kg 4-1/32 ASTM Class 7 Cast Iron Painted
ASTM Class 7 Avoirdupois Square
10191 Weight,CP Square Slotted Interlocking 50lb x 1/2lb 2-3/8 ASTM Class 7 Cast Iron Painted
10162 Weight,CP Square Slotted Interlocking 100lb x 1lb 3-7/16 ASTM Class 7 Cast Iron Painted
10164 Weight,CP Square Slotted Interlocking 200lb x 2lb 3-13/32 ASTM Class 7 Cast Iron Painted
10166 Weight,CP Square Slotted Interlocking 500lb x 5lb 3-9/16 ASTM Class 7 Cast Iron Painted
Hangers- Round and Square
10188 Weight,CP Hanger Round 7oz 3-31/32Dia x 6-5/16H Cast AL Painted
10184 Weight,CP Hanger Round 10oz 3-31/32Dia x 6-5/16H Cast AL Painted
10185 Weight,CP Hanger Round 12oz 3-31/32Dia x 6-5/16H Cast Iron Painted
10186 Weight,CP Hanger Round 17oz 3-31/32Dia x 6-5/16H Cast Iron Painted
10187 Weight,CP Hanger Round 21oz 3-31/32Dia x 6-5/16H Cast Iron Painted
10193 Weight,CP Hanger Square 21oz 3-7/8 x 8H Cast Iron Painted
10382 Weight,CP Hanger Round 7oz 2-31/32Dia x 8-3/8H Cast AL Painted
10379 Weight,CP Hanger Round 10oz 2-31/32Dia x 8-3/8H Cast AL Painted
10380 Weight,CP Hanger Round 12oz 2-31/32Dia x 8-3/8H Cast Iron Painted
10381 Weight,CP Hanger Round 16oz 2-31/32Dia x 8-3/8H Cast Iron Painted
ASTM Class 7 Round
10367 Weight,CP Round Slotted Interlocking 50lb x 1/2lb 2-31/32Dia ASTM Class 7 Cast Iron Painted
10369 Weight,CP Round Slotted Interlocking 100lb x 1lb 2-31/32Dia ASTM Class 7 Cast Iron Painted
10371 Weight,CP Round Slotted Interlocking 200lb x 2lb 2-31/32Dia ASTM Class 7 Cast Iron Painted
10373 Weight,CP Round Slotted Interlocking 300lb x 3lb 3-3/32Dia ASTM Class 7 Cast Iron Painted
10385 Weight,CP Round Slotted Interlocking 500lb x 5lb 3-7/32Dia ASTM Class 7 Cast Iron Painted
ASTM Class 7 Round for Counting Scales
10387 Weight,CP Round Slotted Interlocking 100lb x 1-1/99lb 3Dia ASTM Class 7 Cast Iron Painted
10391 Weight,CP Round Slotted Interlocking 500lb x 5-5/99lb 3-3/16Dia ASTM Class 7 Cast Iron
10427 Weight,CP Round Slotted Interlocking 10lb x 1-1/4lb 2-15/16Dia ASTM Class 7 Cast Iron Painted
10425 Weight,CP Round Slotted Interlocking 5lb x 5/8lb 2-15/16Dia ASTM Class 7 Cast Iron Painted
10411 Weight,CP Round Slotted Interlocking 2lb x 1/4lb 2-7/32Dia ASTM Class 7 Cast Iron Painted
10421 Weight,CP Round Slotted Interlocking 80lb x 1-3/5lb 3Dia ASTM Class 7 Cast Iron Painted
10419 Weight,CP Round Slotted Interlocking 40lb x 4/5lb 2-7/8Dia ASTM Class 7 Cast Iron Painted
10417 Weight,CP Round Slotted Interlocking 20lb x 2/5lb 2-31/32Dia ASTM Class 7 Cast Iron Painted
10415 Weight,CP Round Slotted Interlocking 10lb x 1/5lb 2Dia ASTM Class 7 Cast Iron Painted
10413 Weight,CP Round Slotted Interlocking 5lb x 1/10lb 1-1/2Dia ASTM Class 7 Cast Iron Painted Painted
10409 Weight,CP Round Slotted Interlocking 100lb x 1-9/16lb 3-1/16Dia ASTM Class 7 Cast Iron Painted
10407 Weight,CP Round Slotted Interlocking 50lb x 25/32lb 2-15/16Dia ASTM Class 7 Cast Iron Painted
10405 Weight,CP Round Slotted Interlocking 25lb x 25/64lb 2-31/32Dia ASTM Class 7 Cast Iron Painted
10404 Weight,CP Round Slotted 10lb x 5/32lb 1-1/2Dia ASTM Class 7
Triangles - Single Weights
11417 Weight,CP Triangle Slotted 100lb x 1lb Cast Iron Painted
11419 Weight,CP Triangle Slotted 200lb x 2lb Cast Iron Painted
11421 Weight,CP Triangle Slotted 500lb x 5lb Cast Iron Painted
Hanger
11423 Weight,CP Hanger Triangle 14oz 6-5/16H Painted

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