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Material
Stainless steel 18-8
(19)
Stainless steel 316
(13)
Zinc plated steel
(32)
Zinc plated grade 5 steel
(14)
Grade 8 steel plain finish
(9)
Chrome plated steel
(5)
Hot dipped galvanized steel
(12)
Silicon bronze
(17)
Diameter
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5/16"
(107)
Thread density
18
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3/4"
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1"
(8)
1-1/4"
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1-1/2"
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1-3/4"
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2"
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2-1/4"
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2-1/2"
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3"
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3-1/2"
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4"
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4-1/2"
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5"
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5-1/2"
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6"
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6-1/2"
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7"
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7-1/2"
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8"
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9"
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12"
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Carriage bolts & Plow bolts
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Carriage bolts
Carriage bolts, 18
Carriage bolts, 18
Material
Stainless steel 18-8
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
Stainless steel 316
A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments.
Zinc plated steel
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
Zinc plated grade 5 steel
Grade 5 falls between grade 2 and grade 8 in strength, and is commonly found in automotive applications. A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
Grade 8 steel plain finish
Grade 8 is stronger than grade 5, and is commonly found in high strength automotive applications. A low carbon steel for general use. Unplated finish.
Chrome plated steel
A low carbon steel for general use. Chrome plated and polished for a mirror like finish.
Hot dipped galvanized steel
A low carbon steel for general use. Hot dipped galvanized is a coating for very good corrosion resistance.
Silicon bronze
Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. Exact color varies.
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See also
Elevator bolts
Bolts with a very large flat head and machine threads for use with a nut.