5/16-18x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow

Product Description

Part Number: 31C250HCS8Y
Diameter/Pitch: 5/16"-18
Length Under Head: 2-1/2"
Grade: Grade 8
Finish: Zinc Yellow
Coarse / Fine Threads: Coarse
Partial / Full Threads: Partial
Wrench Size: 1/2"
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BoltsandNuts.com

5/16-18x2-1/2" Hex Head Cap Screws Grade 8 Zinc Yellow

SKU: 31C250HCS8Y

Product Description

Part Number: 31C250HCS8Y
Diameter/Pitch: 5/16"-18
Length Under Head: 2-1/2"
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 Pitch	5/16"-18
Grade Material	Grade 8
Partial Full Threads	Partial
Threads Per Inch	18 TPI
Width Across Corners	0.577" max
Proof Load	6,290 lbf
Tensile Strength	150,000 psi
Tensile Stress Area	0.0524 sq in
Torque Dry	25 ft-lb
Head Type	Hex Cap
Inch Metric	Inch

Length Under Head	2-1/2"
Finish	Zinc Yellow
Coarse Fine Threads	Coarse
Wrench Size	1/2"
Head Height	0.195" – 0.211"
Clamp Load	4,720 lbf
Yield Strength	130,000 psi
Hardness	Rockwell C33–C39
Torque Lubricated	18 ft-lb
Nominal Size	5/16"

Grade	Grade 8
Material	Medium carbon alloy steel, quenched and tempered
Thread Class	2A
Width Across Flats	0.500" (1/2")
Major Diameter	0.312"
Min Tensile Load	7,860 lbf
Proof Stress	120,000 psi
Head Marking	Six radial lines on head
Length	2-1/2"
Thread Length	0.875" min