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Product Description

Part Number: 31C100SFS8Z
Diameter/Pitch: 5/16"-18
Length Under Head: 1"
Grade: Grade 8
Finish: Zinc Clear
Coarse / Fine Threads: Coarse
Partial / Full Threads: Full
Wrench Size: 1/2"
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5/16-18x1" Grade 8 Serrated Hex Flange Bolts Zinc Clear

SKU: 31C100SFS8Z
Product Description

Part Number: 31C100SFS8Z
Diameter/Pitch: 5/16"-18
Length Under Head: 1"
Grade: Grade 8
Finish: Zinc Clear
Coarse / Fine Threads: Coarse
Partial / Full Threads: Full
Wrench Size: 1/2"
Click Here for Tech Drawing




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Diameter Pitch5/16-18
Grade MaterialGrade 8
Partial Full ThreadsFull
Threads Per Inch18 TPI
Proof Load6,290 lbf
Tensile Strength150,000 psi
Tensile Stress Area0.0524 sq in
Torque Dry25 ft-lb
Head TypeHex Flange (Frame Bolt)
Length Under Head1"
FinishZinc Clear
Coarse Fine ThreadsCoarse
Wrench Size1/2"
Clamp Load4,720 lbf
Yield Strength130,000 psi
HardnessRockwell C33–C39
Torque Lubricated18 ft-lb
Nominal Size5/16"
GradeGrade 8
MaterialMedium carbon alloy steel, quenched and tempered
Thread Class2A
Major Diameter0.312"
Min Tensile Load7,860 lbf
Proof Stress120,000 psi
Head MarkingSix radial lines on head
Length1"
Inch MetricInch

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