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Rice Lake Cast Iron ASTM Class 7 Round Hanger Counterpoise Calibration Weight, 7oz Mass

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Specifications for this item
Number of Items
Material Type
Cast Iron
Part Number
Size Name
7oz Mass, ASTM Class 7
Brand Name
Rice Lake
System of Measurement

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Key Features

  • Hanger weight for use with round, slotted counterpoise weights testing industrial devices and field standards
  • Painted cast iron weight has chip-resistant paint that resists corrosion and conforms to NIST Handbook 105-1 standard
  • 7oz. mass has a 20lb. (10kg) weight capacity, 5-1/8" operational length, and 3-31/32" diameter
  • Meets American Society for Testing and Materials (ASTM) E617, Class 7 specification for rough weighing operations in physical and chemical laboratories, and for force-measuring apparatus

Package Details

Shipping Weight: 0.8 pounds
Package Size: 9.2 x 6.3 x 4.75 inches

Product Description

The Rice Lake hanger counterpoise test weight has painted cast iron construction and meets American Society for Testing and Materials (ASTM) Class 7 specifications. The 7oz. hanger weight is designed for use with round, slotted, counterpoise weights for field standard operations and testing industrial devices. It has a 20lb. (10kg) weight capacity, a 5-1/8" operational length, and a 3-31/32" diameter. Painted cast iron weight has a chip-resistant paint that is corrosion-resistant and conforms to NIST Handbook 105-1 standards. The weight meets ASTM E617, Class 7 specifications for rough weighing operations in physical and chemical laboratories, and for force-measuring apparatus.

Calibration weights are used to measure the weight or mass of an object using a balance or scale, or to calibrate other weights or instruments. Calibration weights can be certified or uncertified. Certified weights meet strict guidelines for accuracy and can usually be recertified. Certified weights are used in labs where a high degree of accuracy and repeatability is required. Uncertified weights are used where a lower degree of accuracy is required, including student laboratories, rough weighting operations, and measuring force. Hooked and slotted weights are often used to measure pressure, torque, and tensile strength, and to demonstrate basic laws of physics. Calibration weights differ from lab weights, which are general purpose weights used to hold an object in place, similar to a paperweight.

Science education products incorporate applied math and science principles into classroom projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology.

Rice Lake Weighing Systems manufactures weight-related and process-control equipment for use in research, scientific, and quality control labs. The company, which was founded in 1946 and is headquartered in Rice Lake, WI, meets International Organization for Standardization (ISO) 9001:2008 standards, and is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) to ISO/IEC 17025:2005.

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