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HMA-180 Bituminous Materials Needle for Universal Penetrometer has 40-45mm of exposed needle length. Used for asphalt testing with the HM-320 Manual or HM-322 Automatic Universal Penetrometers.
The needle is made of smooth, hardened, tempered stainless steel with a brass ferrule. Weight of 2.5g to give 50g total when mounted to the Universal Penetrometer’s 47.5g plunger assembly.HMA-180C is identical, except that it comes with NIST certification.
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