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1-1/4"-7 X 3-1/4" Heavy Structural Hex Bolts, ASTM A490 Type 1, Steel, Made in U.S.A.

1-1/4"-7 X 3-1/4" Heavy Structural Hex Bolts, ASTM A490 Type 1, Steel, Made in U.S.A.

PART NUMBER:
BO138-1147X314-000125
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  • Heavy hex structural bolts are designed to withstand the load of a steel-to-steel connection.
  • Commonly used in structural steel joint in construction and building applications.
  • Grade A490 bolts are stronger than Grade A325 but cannot be mechanically or hot dip galvanized.
  • The washer face under the head provides a precision bearing surface.
  • The chamfered point improves engagement with a nut or pre-tapped hole.
DIMENSIONAL ATTRIBUTES
  • Diameter (Nominal): 1-1/4"
  • Thread Pitch: 7
  • Diameter (Dimension): 1.25"
  • Diameter (Minimum): 1.223"
  • Diameter (Maximum): 1.277"
  • Length (Nominal): 3-1/4"
  • Length (Minimum): 3"
  • Length (Maximum): 3.25"
  • Thread Length (Nominal): 2"
  • Across Flats (Basic): 2"
  • Across Flats (Minimum): 1.938"
  • Across Flats (Maximum): 2.000"
  • Head Height, Overall: 25/32"
  • Head Height, Overall (Minimum): 0.749"
  • Head Height, Overall (Maximum): 0.813"
PRODUCT ATTRIBUTES
  • Category: Hex Bolts, Heavy Structural
  • System of Measurement: Inch
  • Brand: Aspen Fasteners®
  • Head Style: Hex Head
  • Head Style Detail: Washer Face
  • Drive Style: External Hex Drive
  • Pitch: Coarse Thread
  • Thread Length: Part Thread
  • Thread Direction: Right-Hand Thread
  • Point: Chamfered Point
  • Material: Steel
  • Material Grade: ASTM A490 Type 1
  • Material Processes: Heat Treated
  • Coating: Uncoated
  • Hardness Rating: Rockwell C33-C38
  • Origin: Made in U.S.A.
  • Standards and Specifications: ASME B18.2.6
Hardness Rating:
Rockwell C33-C38
Shop by System of Measurement:
Inch
Shop by Material:
Steel
Product Class:
Externally Threaded Fasteners
Order:
Machine Thread Fasteners
Category:
Hex Bolts, Heavy Structural
System of Measurement:
Inch
Brand:
Aspen Fasteners
Head Style:
Hex Head
Head Style Detail:
Washer Face
Drive Style:
External Hex Drive
Pitch:
Coarse Thread
Thread Length:
Part Thread
Thread Direction:
Right-Hand Thread
Point:
Chamfered Point
Material:
Steel
Material Grade:
ASTM A490 Type 1
Material Processes:
Heat Treated
Coating:
Uncoated
Origin:
Made in U.S.A.
Standards and Specifications:
ASME B18.2.6
Diameter (Nominal):
1-1/4"
Diameter (Dimension):
1.25"
Diameter (Minimum):
1.223"
Diameter (Maximum):
1.277"
Thread Pitch:
7
Length (Nominal):
3-1/4"
Length (Minimum):
3"
Length (Maximum):
3.25"
Thread Length (Nominal):
2"
Across Flats (Basic):
2"
Across Flats (Minimum):
1.938"
Across Flats (Maximum):
2.000"
Head Height, Overall:
25/32"
Head Height, Overall (Minimum):
0.749"
Head Height, Overall (Maximum):
0.813"
  • Description
    • Heavy hex structural bolts are designed to withstand the load of a steel-to-steel connection.
    • Commonly used in structural steel joint in construction and building applications.
    • Grade A490 bolts are stronger than Grade A325 but cannot be mechanically or hot dip galvanized.
    • The washer face under the head provides a precision bearing surface.
    • The chamfered point improves engagement with a nut or pre-tapped hole.
    DIMENSIONAL ATTRIBUTES
    • Diameter (Nominal): 1-1/4"
    • Thread Pitch: 7
    • Diameter (Dimension): 1.25"
    • Diameter (Minimum): 1.223"
    • Diameter (Maximum): 1.277"
    • Length (Nominal): 3-1/4"
    • Length (Minimum): 3"
    • Length (Maximum): 3.25"
    • Thread Length (Nominal): 2"
    • Across Flats (Basic): 2"
    • Across Flats (Minimum): 1.938"
    • Across Flats (Maximum): 2.000"
    • Head Height, Overall: 25/32"
    • Head Height, Overall (Minimum): 0.749"
    • Head Height, Overall (Maximum): 0.813"
    PRODUCT ATTRIBUTES
    • Category: Hex Bolts, Heavy Structural
    • System of Measurement: Inch
    • Brand: Aspen Fasteners®
    • Head Style: Hex Head
    • Head Style Detail: Washer Face
    • Drive Style: External Hex Drive
    • Pitch: Coarse Thread
    • Thread Length: Part Thread
    • Thread Direction: Right-Hand Thread
    • Point: Chamfered Point
    • Material: Steel
    • Material Grade: ASTM A490 Type 1
    • Material Processes: Heat Treated
    • Coating: Uncoated
    • Hardness Rating: Rockwell C33-C38
    • Origin: Made in U.S.A.
    • Standards and Specifications: ASME B18.2.6

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