ASTM F844-04
(Specification)Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
SCOPE
1.1 This specification covers round and miscellaneous shape steel plain (flat) washers furnished in an unhardened condition.
1.2 The 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 American National Standard B18.22.1, Type A, Tables 1A and Tables 1B.
1.4 Hardened washers for use with heat-treated structural bolts are covered by Specifications F 436 and F 436M.
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Designation: F 844 – 04
Standard Specification for
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Washers, Steel, Plain (Flat), Unhardened for General Use
This standard is issued under the fixed designation F 844; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.2 ANSI/ASME Standards:
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B18.22.1 Plain Washers
1.1 Thisspecificationcoversroundandmiscellaneousshape
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B18.24.1 Part Identifying Number (PIN) Code System
steel plain (flat) washers furnished in an unhardened condition.
2.3 Military Specification:
1.2 The washers are intended for general use bolt, nut, and
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DOD-P-16232 Phosphate Coating for Ferrous Metals
stud applications to provide increased bearing surface, spacing,
2.4 Federal Specification:
and to prevent galling.
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QQ-P-416 Plating, Cadmium (Electrodeposited)
1.3 Unless otherwise specified, the washers are furnished
with dimensions conforming to American National Standard
3. Ordering Information
B18.22.1, Type A, Tables 1A and Tables 1B.
3.1 Orders for washers under this specification shall in-
1.4 Hardened washers for use with heat-treated structural
clude:
bolts are covered by Specifications F 436 and F 436M.
3.1.1 Quantity (number of pieces of same item and size).
2. Referenced Documents 3.1.2 Name of item (steel plain washers).
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3.1.3 Size (Nominal inside diameter and thickness. Include
2.1 ASTM Standards:
outside diameter, when required).
A 29/A 29M SpecificationforSteelBars,CarbonandAlloy,
3.2 The following requirements are optional and may be
Hot-Wrought, General Requirements for
specified when required:
A 153/A 153M Specification for Zinc Coating (Hot-Dip) on
3.2.1 Dimensions if other than ANSI B18.22.1, Type A.
Iron and Steel Hardware
3.2.2 Finish if other than oiled (see 4.3 through 4.3.6).
A 568/A 568M Specification for Steel, Sheet, Carbon, and
3.2.3 Chemical composition, if required (see 5.1.2).
High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,
3.2.4 Hardness, if required (see 6.2).
General Requirements for
3.2.5 Shipment lot Testing, if required (see 9.2).
A 751 Test Methods, Practices, and Terminology for
3.2.6 Test Reports, if required (see Section 12).
Chemical Analysis of Steel Products
3.2.7 Marking, if required (see 14.1).
B 633 Specification for Electrodeposited Coatings of Zinc
3.2.8 For establishment of a part identifying system, see
on Iron and Steel
ASME B18.24.1.
B 695 Specification for Coatings of Zinc Mechanically
Deposited on Iron and Steel
4. Materials and Manufacture
D 3951 Practice for Commercial Packaging
4.1 Material—The washers shall be punched from hot-
F 436 Specification for Hardened Steel Washers
rolled, hot-rolled and pickled, or cold-rolled steel; or shall be
F 436M Specification for Hardened Steel Washers [Metric]
machined from bar stock or tubing; or shall be forged at the
F 606 Test Methods for Determining the Mechanical Prop-
manufacturer’s option.
erties of Externally and Internally Threaded Fasteners,
4.2 Burr Removal—The washers shall be tumbled, vibrated,
Washers, and Rivets
or otherwise processed to minimize burrs.
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
4.3 Protective Finishes:
cal Properties and Performance Inspection
4.3.1 Unprotected Washers—Unless otherwise specified,
the washer shall be furnished plain, with no protective finish
other than oil to minimize rusting.
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This specification is under the jurisdiction of Committee F16 on Fasteners and
isthedirectresponsibilityofSubcommitteeF16.02onSteelBolts,Nuts,Rivets,and
Washers.
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Current edition approved Aug. 1, 2004. Published August 2004. Originally Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
approved in 1983. Last previous edition approved in 2000 as F 844 – 00. 4th Floor, New York, NY 10036.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Society of Mechanical Engineers (ASME), ASME
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM International Headquarters, Three Park Ave., New York, NY 10016-5990.
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Standards volume information, refer to the standard’s Document Summary page on Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
the ASTM website. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098
*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.
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F844–04
4.3.2 Zinc Coatings, Hot-Dip and Mechanically Deposited: whichthefastenershavebeenmanufacturedshall,attheoption
4.3.2.1 When zinc-coated was
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