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Product Description

Part Number: 31C225BFL8Y
Diameter/Pitch: 5/16"-18
Length Under Head: 2-1/4"
Grade: Grade 8
Finish: Zinc Yellow
Coarse / Fine Threads: Coarse
Partial / Full Threads: Partial
Wrench Size: 1/2"
Click Here for Tech Drawing

BoltsandNuts.com

5/16-18x2-1/4" Grade 8 Hex Flange Frame Bolts Zinc Yellow

SKU: 31C225BFL8Y
Product Description

Part Number: 31C225BFL8Y
Diameter/Pitch: 5/16"-18
Length Under Head: 2-1/4"
Grade: Grade 8
Finish: Zinc Yellow
Coarse / Fine Threads: Coarse
Partial / Full Threads: Partial
Wrench Size: 1/2"
Click Here for Tech Drawing

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Diameter Pitch5/16"-18
Grade MaterialGrade 8
Partial Full ThreadsPartial
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 Head2-1/4"
FinishZinc Yellow
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
Length2-1/4"
Inch MetricInch

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