VISUAL FASTENER GUIDE

Security / Tamperproof Fasteners & Drives

ScrewsDrivesBolt StylesHead StylesSem ScrewsSocket & Set Screws
Nuts, Washers, Thumb Screws & Wing ScrewsPins, Rivets & StudsWelding Fasteners
Grade Markings for Steel Bolts and Screws Standard Tapping Screws


Grade Markings for Steel Bolts and Screws

Physical Properties

Specifications

Material

Bolt and Screw Size (in.)

Proof Load
(psi)

Tensile Strength Min. (psi)

SAE - Grade 0 Steel Up to
1-1/2"
- -
SAE - Grade 1 Low Carbon Steel Up to
1-1/2"
- 55,000
ASTM - A 307 Low Carbon Steel All Sizes - 55,000
SAE - Grade 2 Low Carbon Steel Up to
1-1/2"
55,000 69,000
    Over 1/2" to 3/4" 52,000 64,000
    Over 3/4" to
1-1/2"
28,000 55,000


Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Load
(psi)
Tensile Strength Min. (psi)
SAE - Grade 3 Medium Carbon Steel, Cold Worked Up to 1/2" 85,000 110,000
    Over 3/4" to 5/8"    


Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Load
(psi)
Tensile Strength Min. (psi)
SAE - Grade 5 Medium Carbon Steel, Quenched & Tempered Up to 3/4" 85,000 110,000
    Over 3/4" to 1" 78,000 115,000
    Over 1"
to 1-1/2"
74,000 105,000
    Up to 3/4" 85,000 120,000
    Over 1"
to 1-1/2"
74,000 105,000
    Over 1" to 3" 55,000 90,000


Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Load
(psi)
Tensile Strength Min. (psi)
ASTM - A 325 Medium Carbon Steel, Quenched & Tempered 1/2",5/8",3/4" 85,000 120,000
    7/8",1" 78,000 115,000
    1-1/8"
to 1-1/2"
74,000 105,000

Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Load
(psi)
Tensile Strength Min. (psi)
SAE - Grade 5.1 Low or Medium Carbon Steel, Quenched & Tempered Screw with Assembled Lock Washer Up to 3/8" incl. 85,000 120,000


Physical Properties

Specifications Material Bolt and Screw Size (in.) Proof Lead
(psi)
Tensile Strength Min. (psi)
ASTM - A 354 Grade BB Low Alloy Steel, Steel, Quenched and Tempered Up to 2-1/2" 80,000 105,000
   

Over 2-1/2"
to 4"

   



Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Lead
(psi)
Tensile Strength Min. (psi)
ASTM - A 354 Grade BC Low Alloy Steel, Steel, Quenched and Tempered Up to 2-1/2" 105,000 125,000
    Over 2-1/2"
to 4"
95,000 115,000



Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Lead
(psi)
Tensile Strength Min. (psi)
SAE-Grade 7 Medium Carbon Alloy Steel , Quenched & Tempered, Roll Threaded after heat treatment Up to 1/2" 105,000 133,000



Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Lead
(psi)
Tensile Strength Min. (psi)
SAE - Grade 8 Medium Carbon Alloy Steel, Quenched & Tempered Up to 1/2" 120,000 150,000



Physical Properties
Specifications Material Bolt and Screw Size (in.) Proof Lead
(psi)
Tensile Strength Min. (psi)
ASTM A 490 High Strength Structural Bolts, Alloy Steel 1/2" to 2-1/2" 120,000 150,000
    Over 2-1/2"
to 4"
105,000 140,000

Hudson Fasteners provides a wide range of anchors, bits, bolts, nuts, washers, sems, screws and other fasteners to all types of industries. We also specialize in assortment kits and JIT delivery programs to satisfy all types of stocking programs.
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