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Grade 5 Hex Head Cap Screws

Grade 5 Hex Head Cap Screws
Medium Carbon Heat Treated Steel
Coarse (USS) & Fine (SAE) Thread
 
Nutty Company - Grade 5 Hex Head Cap Screws
Zinc Plated
.

Head Markings

Grade or Class

Material

Nominal Size Range
(Inches)

Mechanical Properties

Proof Load (psi)

Minimum Yield Strength (psi)

Minimum Tensile Strength (psi)

American Bolts

Nutty Company - Grade 5
3 Radial Lines

Grade 5

Medium Carbon Steel, Quenched and Tempered

1/4 thru 1

85,000

92,000

120,000

Over 1 thru 1-1/2

74,000

81,000

105,000

 
Core Hardness1/4 through 1 in. diameter, all lengths: Rockwell C25 - C34.

1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell C19 - C30.

Surface Hardness

1/4 through 1 in. diameter, all lengths: Rockwell 30N54 maximum.

1-1/8 through 1-1/2 in. diameter, all lengths: Rockwell 30N50 maximum.

Proof Load

1/4 through 1 in. diameter, all lengths: 85,000 psi.

1-1/8 through 1-1/2 in. diameter, all lengths: 74,000 psi.

Yield Strength

1/4 through 1 in. diameter, all lengths: 92,000 psi. minimum.

1-1/8 through 1-1/2 in. diameter, all lengths: 81,000 psi. minimum.

Tensile Strength

1/4 through 1 in. diameter, all lengths: 120,000 psi. minimum.

1-1/8 through 1-1/2 in. diameter, all lengths: 105,000 psi. minimum.

 
The length of a cap screw is measured from
the underhead bearing surface to the extreme end of the screw
 
Helpful Hint to Remember...
Formula to find the length of thread on a Hex Head Cap Screw:
Twice the Diameter plus 1/2" (2D+1/2)
example: A 3/8-16 x 5" Grade 5 Hex Head Cap Screw has 1-1/4" of Thread (2 times 3/8" plus 1/2") and 3-3/4" of Plain Shank ( 5" minus 1-1/4" equal 3-3/4") under the Head.
 
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