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
2"
Dimensional standard
ASME B18.5
Length tolerance
+0.02" / -0.04"
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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