ASTM F844-19
(Specification)Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
ABSTRACT
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.
SCOPE
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 F436/F436M.
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.
General Information
Relations
Buy Standard
Standards Content (Sample)
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.
Designation: F844 −19
Standard Specification for
1
Washers, Steel, Plain (Flat), Unhardened for General Use
ThisstandardisissuedunderthefixeddesignationF844;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* F436/F436M Specification for Hardened Steel Washers Inch
and Metric Dimensions
1.1 Thisspecificationcoversroundandmiscellaneousshape
F606/F606M Test Methods for Determining the Mechanical
steel plain (flat) washers furnished in an unhardened condition.
Properties of Externally and Internally Threaded
1.2 Thesewashersareintendedforgeneralusebolt,nut,and
Fasteners, Washers, Direct Tension Indicators, and Rivets
stud applications to provide increased bearing surface, spacing,
F1470 Practice for Fastener Sampling for Specified Me-
and to prevent galling.
chanical Properties and Performance Inspection
F1941/F1941M Specification for Electrodeposited Coatings
1.3 Unless otherwise specified, washers are furnished with
dimensions conforming to B18.21.1, Type A, Table 11. on Mechanical Fasteners, Inch and Metric
F2329/F2329M Specification for Zinc Coating, Hot-Dip,
1.4 Hardened washers for use with heat-treated structural
Requirements for Application to Carbon and Alloy Steel
bolts are covered by Specifications F436/F436M.
Bolts, Screws, Washers, Nuts, and Special Threaded
1.5 The values stated in inch-pound units are to be regarded
Fasteners
3
as standard. No other units of measurement are included in this
2.2 ASME Standards:
standard.
B18.21.1 Washers: Helical Spring-Lock, Tooth Lock, and
1.6 This international standard was developed in accor- Plain Washers (Inch Series)
dance with internationally recognized principles on standard- B18.24 Part Identifying Number (PIN) Code System Stan-
ization established in the Decision on Principles for the dard for B18 Fastener Products
Development of International Standards, Guides and Recom- 2.3 Military Specification:
4
mendations issued by the World Trade Organization Technical DOD-P-16232 Phosphate Coating for Ferrous Metals
Barriers to Trade (TBT) Committee. 2.4 Federal Specification:
4
QQ-P-416 Plating, Cadmium (Electrodeposited)
2. Referenced Documents
3. Ordering Information
2
2.1 ASTM Standards:
3.1 Orders for washers under this specification shall in-
A29/A29M SpecificationforGeneralRequirementsforSteel
clude:
Bars, Carbon and Alloy, Hot-Wrought
3.1.1 Quantity (number of pieces of same item and size).
A568/A568M Specification for Steel, Sheet, Carbon,
3.1.2 Name of item (steel plain washers).
Structural,andHigh-Strength,Low-Alloy,Hot-Rolledand
3.1.3 Size (Nominal inside diameter and thickness. Include
Cold-Rolled, General Requirements for
outside diameter, when required).
A751 Test Methods and Practices for Chemical Analysis of
Steel Products
3.2 The following requirements are optional and may be
B695 Specification for Coatings of Zinc Mechanically De-
specified when required:
posited on Iron and Steel 3.2.1 Dimensions if other than B18.21.1, Type A.
3.2.2 Finish if other than oiled (see 4.3 through 4.3.6).
3.2.3 Chemical composition, if required (see 5.1.2).
3.2.4 Hardness, if required (see 6.2).
1
This specification is under the jurisdiction of Committee F16 on Fasteners and
3.2.5 Test Reports, if required (see Section 12).
is the direct responsibility of Subcommittee F16.06 on Steel Washers and Rivets.
Current edition approved . Published December 2020. Originally approved in 1983.
Last previous edition approved in 2013 as F844 – 07a(2013). DOI: 10.1520/F0844-
3
19. Available from American Society of Mechanical Engineers (ASME), ASME
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.asme.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,
the ASTM website. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F844 − 19
3.2.6 Marking, if required (see 14.1). 5.1.1 Washers shall be steel, and unless otherwise specified,
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F844 − 07a (Reapproved 2013) F844 − 19
Standard Specification for
1
Washers, Steel, Plain (Flat), Unhardened for General Use
This standard is issued under the fixed designation F844; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.This standard has been approved for use
by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition.
1.2 TheThese 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, the washers are furnished with dimensions conforming to B18.22.1,B18.21.1, Type A, Tables 1A
and Tables 1B.Table 11.
1.4 Hardened washers for use with heat-treated structural bolts are covered by Specifications F436F436/F436M and F436M.
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
2
2.1 ASTM Standards:
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
B633 Specification for Electrodeposited Coatings of Zinc on Iron and Steel
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
D3951 Practice for Commercial Packaging
F436F436/F436M Specification for Hardened Steel Washers Inch and Metric Dimensions
F436M Specification for Hardened Steel Washers (Metric)
1
This specification is under the jurisdiction of Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivets and
Washers. Current edition approved Nov. 1, 2013Dec. 1, 2019. Published January 2014December 2020. Originally approved in 1983. Last previous edition approved in
20072013 as F844 – 07a.F844 – 07a(2013). DOI: 10.1520/F0844-07AR13.10.1520/F0844-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F844 − 19
F606F606/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
F1941/F1941M Specification for Electrodeposited Coatings on Mechanical Fasteners, Inch and Metric
F2329F2329/F2329M Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts,
Screws, Washers, Nuts, and Special Threaded Fasteners
3
2.2 ASME Standards:
B18.22.1B18.21.1 Plain WashersWashers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)
B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products
2.3 Military Specification:
4
DOD-P-16232 Phosphate Coating for Ferrous Metals
2.4 Federal Specification:
4
QQ-P-416 Plating, Cadmium (Electrodeposited)
3. Ordering Information
3.1 Orders for washers under this specification shall include:
3.1.1 Quantity (number of pieces of same item and size).
3.1.2 Name of item (steel plain washers).
3.1.3 Size (Nominal inside diameter and thickness. Include outside diameter, when required).
3.2 The following requirements are optional and may be specified when required:
3.2.1 D
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.