The specification provides the standard dimensional requirements for obtaining, within practical limits, interchangeability in stopcocks and stoppers for ordinary laboratory and industrial applications. It solely covers ground surfaces dimensional interchangeability, and does not involve design characteristics of the item except where specified. Materials shall be tested and shall conform to the specified values of design, dimension, designation, tolerances, taper, and master gages; as stated in the requirements for Single Straight-Bore Taper-Ground Stopcocks, Single Oblique-Bore Stopcocks, Double Oblique-Bore (Three-Way) Stopcocks, T-Bore and 120-deg Bore Stopcocks, Taper-Ground Flask Stoppers, and Taper-Ground Bottle Stoppers.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 The specification provides standard dimensional requirements for obtaining, within practical limits, interchangeability in stopcocks and stoppers for ordinary laboratory and industrial applications. It covers dimensional interchangeability of the ground surfaces only and does not involve design characteristics of the item except where specified.
—The dimensions pertaining to stopcocks and stoppers were taken from the Commercial Standard CS 21 of the U.S. Department of Commerce.
—Although glass is the most commonly used material for stopcocks and stoppers, other materials may be used as specified. Stopcocks and stoppers constructed from glass should conform to Specifications E438 and E671.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E438 Specification for Glasses in Laboratory Apparatus
E671 Specification for Maximum Permissible Thermal Residual Stress in Annealed Glass Laboratory Apparatus
E920 Specification for Commercially Packaged Laboratory Apparatus
E921 Specification for Export Packaged Laboratory Apparatus
E1133 Practice for Performance Testing of Packaged Laboratory Apparatus for United States Government Procurements
E1157 Specification for Sampling and Testing of Reusable Laboratory Glassware
ground; stopcocks; stoppers ;
ICS Number Code 71.040.20 (Laboratory ware and related apparatus)
ASTM International is a member of CrossRef.
Citing ASTM Standards
[Back to Top]