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Rice Lake 12839 Cast Iron Painted Grip Handle Test Weight, 50lb Mass, NIST Class F

  • Based on 88 reviews
Condition: New
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Availability: In Stock.
Fulfilled by SIM Supply, Inc.

Arrives Saturday, Oct 3
Order within 22 hours and 1 minute
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Size: 50lb


Features

  • Metric and U.S. customary grip-handle test weight for testing field standards and industrial devices
  • Painted cast iron weight has chip-resistant paint that resists corrosion and conforms to NIST Handbook 105-1 standard
  • Sealable adjusting cavity for adjusting total weight
  • Meets National Institute of Standards and Technology (NIST) Class F specification for commercial "Legal-for-Trade" weighing operations

Description

The Rice Lake grip-handle test weight is constructed of painted cast iron, is available in metric and U.S. customary (also referred to as English and avoirdupois), meets National Institute of Standards and Technology (NIST) Class F specifications, and is designed for testing field standards and industrial devices. The sealing cavity can be used to adjust the total weight. Painted cast iron weight has a chip-resistant paint that is corrosion- resistant and conforms to NIST Handbook 105-1 standards. A sealable adjusting cavity allows the weight to be fractionally adjusted to meet individual specifications. The weight meets NIST Class F specification for commercial "Legal-for-Trade" weighing operations often required by state and local weights and measures officials, device installers and service technicians. Class F weights can be used to test the accuracy of most Class III scales, all scales of Class III L or IIII, and scales not marked with a class designation. NIST Class F weights are manufactured to specifications of NIST HB-105-1.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.

Material: Cast Iron


Brand: Rice Lake


Color: Multicolor


Style: Classic


Product Dimensions: 8.4"L x 6"W


Color: Multicolor


Style Name: Classic


Exterior Finish: Cast Iron


Shape: Rectangular


Finish Types: Painted


Brand Name: Rice Lake


Included Components: Weights


Model Number: 12839


Manufacturer: Rice Lake Weighing Systems


Manufacturer Warranty Description: No Warranty


UPC: 133588114163


Manufacturer Part Number: 12839


Handle Type: Grip Handle


Additional Features: Easy to Install


Handle Compatibility: Application Specific


Item Dimensions L x W: 8.4"L x 6"W


Item Weight: 50 pounds


Unit Count: 1 Count


Number of Items: 1


Item Depth: 2.5 inches


Material Type: Cast Iron


Metal Type: Cast Iron


Handle Material: Cast Iron


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Works wonder.
Size: 25lb
Solid on Zebra scales. Work perfectly.
Reviewed in the United States on August 18, 2026 by Sebastian Suh

  • excelente
Size: 25lb
muy buena calidad
Reviewed in the United States on August 31, 2026 by MM

  • YES, these are excellent, extremely accurate weights. NO, they are not Certified.
Size: 20kg
I have 2 Rice Lake Weights and 1 Troemner. The Rice Lake seems to be better quality. 1 of my Rice Lake weights is NIST certified(the ones sold here are NOT certified.) The 10KG that I purchased is amazingly accurate, certified at 10.0000217kg. Crazy accurate. I will buy more of these for sure. The surface of the weights is quite good on Rice Lake, but it's cast iron so expect a rough texture. ... show more
Reviewed in the United States on January 16, 2018 by Rez

  • Four Stars
Size: 20lb
Needed as a backup to an electronic scale
Reviewed in the United States on September 28, 2017 by Steve Krauss

  • Accurate scale calibration weight
Size: 25lb
Excellent calibration weight - perfect to calibrate your shipping, receiving scales
Reviewed in the United States on June 20, 2025 by S Knecht

  • These things are a great implement for strength training
Size: 20lb
I purchased these scale weights to work on various grip and strength training exercises. By using magnets and smaller weight plates, I can increase the overall weight to accommodate different exercises. I am very happy with these.
Reviewed in the United States on August 14, 2018 by NJ Meathead

  • Was painted gold just like the photo
Size: 10kg
Weighed 10kg. Was painted gold just like the photo. Wow. Super excited to put it into use on our production floor. What more could you ask for in a calibration weight?
Reviewed in the United States on December 14, 2017 by Andreas Deibel

  • Great deal
Size: 20lb
Perfect for when you need a 20lb weight to test a scale couldn’t be happier
Reviewed in the United States on October 3, 2019 by devon

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