f436m

Designation:F 436M-93(Reapproved 2000)METRICStandard Specification forHardened Steel Washers [Metric]1This standard is issued under the fixed designation F436M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon (e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.ScopeA 153 Specification for Zinc Coating (Hot-Dip)on Iron and1.1 This specifi cation covers the chemical,mechanical,andSteel Hardware-dimensional requirements for metric hardened steel washersA 242/A 242M Specification for High-Strength Low-Alloyfor use with fasteners having nominal thread diameters M12Structural Steel3through M100.These washers are intended for general-purposeA 325M Specifi cation for High-Strength Bolts for Struc-mechanical and structural use with bolts,nuts,studs,and othertural Steel Joints [Metric]4internally and externally threaded fasteners.These washers areA 490M Specifi cation for High-Strength Steel Bolts,suitable for use with fasteners covered in Specifi cationsClasses 10.9 and 10.9.3,for Structural Steel Joints [Met-A 325M,A 490M,A 563M and with fasteners of Specifi cationric]4F 568 property classes 8.8 and higher.A 563M Specifi cation for Carbon and Alloy Steel Nuts1.2 The types of washers covered in this specifi cation are:Metric1.2.1 Tipe /-Washers made of carbon steel.A 588/A 588M Specification for High-Strength Low-Alloy1.2.2 Tipe 3-Washers made of steel having atmosphericStructural Steel with 50 ksi [345 MPa]Minimum Yieldcorrosion resistance and weathering characteristics comparablePoint to 4 in.[100 mm]Thickto that of steels covered in Specifi cations A 242/A 242M,A 709 Specification for Structural Steel for Bridges3A 588/A 588M,and A 709.The atmospheric corrosion resis-A 751 Test Methods,Practices,and Terminology fortance of these steels is substantially better than that of carbonChemical Analysis of Steel Productsssteel with or without copper addition.See 5.1.When properlyB695 Specifi cation for Coatings of Zinc Mechanicallyexposed to the atmosphere,these steels can be used bareDeposited on Iron and Steel6(uncoated)for many applications.D 3951 Practice for Commercial Packaging?1.3 The styles of washers covered in this specifi cation are:F 568 Specifi cation for Carbon and Alloy Steel Externally1.3.1 Circular Washers-Circular washers in nominal sizesThreaded Metric Fasteners12 mm through 100 mm,are suitable for applications whereF 606M Test Methods for Determining the Mechanicalsufficient space ex ists and angularity permits.Properties of Externally and Internally Threaded Fasteners,1.3.2 Beveled Washers-Beveled washers are square andWashers,and Rivets [Metric]4rectangular,in nominal sizes 12 mm through 36 mm,with aG 101 Guide for Estimating the Atmospheric Corrosionbeveled 1:6 surf