Tapered nuts are specialized fastening components characterized by their conical shape, featuring a gradually decreasing diameter from one end to the other. This unique design allows for self-centering alignment and enhanced stress distribution, providing superior resistance to vibrations and high loads. By creating a tight, interference fit when mated with tapered bolts or holes, tapered nuts ensure secure, long-lasting connections in demanding applications where standard nuts may fail.
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Standard
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Country/Region
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Description
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ASTM A194
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USA
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Specifies mechanical requirements for high-strength nuts, applicable to tapered variants
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ISO 8678
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International
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Defines dimensions and tolerances for tapered nuts used in structural applications
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DIN 916
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Germany
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Details the specifications for metric tapered nuts, including thread and cone angle standards
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GB/T 80 - 1988
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China
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Covers product requirements for tapered nuts used in mechanical assemblies
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JIS B 1186
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Japan
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Japanese standard for tapered nuts, focusing on dimensional accuracy and strength ratings
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Grade
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Material
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Tensile Strength (MPa)
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Application Scenarios
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8
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Medium-carbon steel (e.g., 45# steel)
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800
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General industrial machinery, automotive suspension systems
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10
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Alloy steel (e.g., 35CrMo)
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1000
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Heavy-duty equipment, construction cranes, and mining machinery
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12
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Alloy steel (e.g., 40Cr)
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1200
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High-stress aerospace components and military vehicles
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A2-70 (Stainless Steel)
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304 stainless steel
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700
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Corrosion-resistant environments like food processing and marine applications
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A4-80 (Stainless Steel)
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316 stainless steel
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800
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Chemical plants, coastal infrastructure, and high-corrosion settings
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Titanium Alloy
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Ti-6Al-4V
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900+
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Aerospace and high-performance applications requiring lightweight, high-strength connections
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Treatment Method
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Abbreviation
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Description
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Zinc Plating
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Zn
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Basic rust protection (clear, blue, or yellow finishes), suitable for indoor use
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Hot-Dip Galvanizing
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HDG
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Superior corrosion resistance, ideal for outdoor and heavy-industrial environments
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Black Oxide Coating
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Black
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Creates a non-reflective surface with moderate rust resistance for internal components
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Dacromet Coating
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Dacromet
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Chromium-free, high-performance coating offering excellent corrosion and anti-galling properties
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Nickel Plating
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Ni
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Enhances appearance and provides moderate corrosion protection for visible parts
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Passivation (Stainless Steel)
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-
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Improves corrosion resistance by forming a protective oxide layer on stainless steel nuts
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