Used to determine proof of ethyl alcohol spirits, these hydrometers are available in various ranges from 0 to 206%. 300mm 12 long lead free ballast and glass made according to the bureau of internal revenue, u.s. Treasury department, the tolerances listed for these hydrometers are those outlined in circular 555 of the national bureau of standards, testing of hydrometers individually serialized temperature standardization: 60?f 15?c hand inspected by our u.s. Quality team packaged with a multi-language english, french, german, italian, portuguese, and spanish statement of accuracy indicating accuracy traceable to nist note : hydrometers should be stored in a clean, dry, safe place, and should not be subjected to extreme temperatures.
USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.22.1, Material Steel, Material Grade/Class Grade 2, Finish Zinc Yellow, For Screw Size 3/8 in, Inside Diameter 0.438 in, Outside Diameter 1 in, Maximum Thickness 0.084 in, System of Measurement Inch, Minimum Thickness 0.084 in, Color Yellow, Pack Size Bulk Pack, Rockwell Hardness RC38, Thickness Tolerance +/-0.020 in, Package Quantity 3700