1、Designation:F84407a(Reapproved 2013)Standard Specification forWashers,Steel,Plain(Flat),Unhardened for General Use1This standard is issued under the fixed designation F844;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of l
2、ast revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers round and miscellaneous shapesteel plain(flat)washers furnished in an unhardened condition.1.2 The w
3、ashers are intended for general use bolt,nut,andstud applications to provide increased bearing surface,spacing,and to prevent galling.1.3 Unless otherwise specified,the washers are furnishedwith dimensions conforming to B18.22.1,Type A,Tables 1Aand Tables 1B.1.4 Hardened washers for use with heat-tr
4、eated structuralbolts are covered by Specifications F436 and F436M.1.5 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard.2.Referenced Documents2.1 ASTM Standards:2A29/A29M Specification for General Requirements for SteelBar
5、s,Carbon and Alloy,Hot-WroughtA568/A568M Specification for Steel,Sheet,Carbon,Structural,and High-Strength,Low-Alloy,Hot-Rolled andCold-Rolled,General Requirements forA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsB633 Specification for Electrodeposited Coatings
6、of Zinc onIron and SteelB695 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelD3951 Practice for Commercial PackagingF436 Specification for Hardened Steel WashersF436M Specification for Hardened Steel Washers(Metric)F606 Test Methods for Determining the Mechanical Proper-t
7、ies of Externally and Internally Threaded Fasteners,Washers,Direct Tension Indicators,and RivetsF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance InspectionF2329 Specification for Zinc Coating,Hot-Dip,Require-ments for Application to Carbon and Alloy Steel Bol
8、ts,Screws,Washers,Nuts,and Special Threaded Fasteners2.2 ASME Standards:3B18.22.1 Plain WashersB18.24 Part Identifying Number(PIN)Code System Stan-dard for B18 Fastener Products2.3 Military Specification:DOD-P-16232 Phosphate Coating for Ferrous Metals42.4 Federal Specification:QQ-P-416 Plating,Cadm
9、ium(Electrodeposited)43.Ordering Information3.1 Orders for washers under this specification shall in-clude: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.Includeoutside diameter,when required).3.2 The fo
10、llowing requirements are optional and may bespecified when required:3.2.1 Dimensions if other than B18.22.1,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).3.2.5 Shipment lot Testing,if required(see
11、9.2).3.2.6 Test Reports,if required(see Section 12).3.2.7 Marking,if required(see 14.1).3.2.8 For establishment of a part identifying system,seeASME B18.24.4.Materials and Manufacture4.1 MaterialThe washers shall be punched from hot-rolled,hot-rolled and pickled,or cold-rolled steel;or shall be1This
12、 specification is under the jurisdiction of Committee F16 on Fasteners andis the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nuts,Rivets andWashers.Current edition approved Nov.1,2013.Published January 2014.Originallyapproved in 1983.Last previous edition approved in 2007 as F844 07a
13、.DOI:10.1520/F0844-07AR13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mech
14、anical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.4Available from DLA Document Services,Building 4/D,700 Robbins Avenue,Philadelphia,PA 19111-5094,http:/quicksearch.dla.mil/Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West
15、 Conshohocken,PA 19428-2959.United States1 machined from bar stock or tubing;or shall be forged at themanufacturers option.4.2 Burr RemovalThe washers shall be tumbled,vibrated,or otherwise processed to minimize burrs.4.3 Protective Finishes:4.3.1 Unprotected WashersUnless otherwise specified,thewas
16、her shall be furnished plain,with no protective finish otherthan oil to minimize rusting.4.3.2 Zinc Coatings,Hot-Dip and Mechanically Deposited:4.3.2.1 When zinc-coated washers are required,the pur-chaser shall specify the zinc-coating process,such as“hot dip,”“mechanically deposited,”or“no preference.”4.3.2.2 When“hot-dip”is specified,the washers shall bezinc-coated by hot dipping in accordance with the requirementsof Specification F2329.4.3.2.3 When“mechanically deposited”is specified,thewashe
