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This specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition. The washers are intended for general use bolt, nut, and stud applications to provide increased bearing surface, spacing, and to prevent galling. The washers shall be punched from hot-rolled, hot-rolled and pickled, or cold-rolled steel; or shall be machined from bar stock or tubing; or shall be forged. The washers shall also be tumbled, vibrated, or otherwise processed to minimize burrs. These washers may be zinc-coated, hot-dip-coated, cadmium-plated, or zinc-plated by using hot dipping, mechanical deposition, and electroplating processes. Chemical analysis may be conducted in order to determine the composition of washers and a hardness test may also be performed.
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 This specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition.
1.2 These washers are intended for general use bolt, nut, and stud applications to provide increased bearing surface, spacing, and to prevent galling.
1.3 Unless otherwise specified, washers are furnished with dimensions conforming to B18.21.1, Type A, Table 11.
1.4 Hardened washers for use with heat-treated structural bolts are covered by Specifications .
1.5 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A29/A29M Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
A568/A568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
F436/F436M Specification for Hardened Steel Washers Inch and Metric Dimensions
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
Federal SpecificationQQ-P-416 Plating, Cadmium (Electrodeposited)
Military SpecificationDOD-P-16232 Phosphate Coating for Ferrous Metals Available from DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/
ICS Number Code 21.060.30 (Washers, locking elements)
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ASTM F844-19, Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top