Carriage bolts, Zinc plated grade 5 steel, 5/16"-18 x 3-1/2"
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Product details
Bolt Depot product#
18281
Units
US
Category
Carriage bolts & Plow bolts
Bolts with no drive and machine threads for use with a nut.
Head style
Carriage
Carriage heads are large smooth and domed with no drive.
Neck style
Square
Material
Steel
A tempered medium carbon steel.
Plating
Zinc
Zinc plated for moderate corrosion resistance.
Grade
Grade 5
Grade 5 falls between grade 2 and grade 8 in strength, and is commonly found in automotive applications.
Thread density
Coarse
Diameter
5/16"
Thread count
18
Length
3-1/2"
Dimensional standard
ASME B18.5
Length tolerance
+0.04" / -0.06"
Thread direction
Right hand
Head diameter
0.688" - 0.719"
Head height
0.156" - 0.176"
Square width
0.307" - 0.324"
Square depth
0.156" - 0.187"
Fully threaded
Yes
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