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1/4"-28 X 3-1/2" Hex Head Cap Screws Bolts, UNF Fine Thread, ASTM A354 Grade BD Alloy Steel, Yellow Zinc and Baked, DFARS

1/4"-28 X 3-1/2" Hex Head Cap Screws Bolts, UNF Fine Thread, ASTM A354 Grade BD Alloy Steel, Yellow Zinc and Baked, DFARS

PART NUMBER:
MI007-1428X312-000550
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  • Military grade fasteners are DFARS compliant and made in North America. Certifications available.
  • Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
  • The washer face under the head provides a precision bearing surface.
  • The chamfered point improves engagement with a nut or pre-tapped hole.
  • In general, fine thread fasteners are about 10% stronger than coarse threads under static loading.
DIMENSIONAL ATTRIBUTES
  • Diameter (Nominal): 1/4"
  • Thread Pitch: 28
  • Diameter (Dimension): 0.25"
  • Diameter (Minimum): 0.245"
  • Diameter (Maximum): 0.250"
  • Length (Nominal): 3-1/2"
  • Thread Length (Nominal): 0.75"
  • Across Flats (Basic): 7/16"
  • Across Flats (Minimum): 0.428"
  • Across Flats (Maximum): 0.438"
  • Head Height, Overall: 0.1563"
  • Head Height, Overall (Minimum): 0.150"
  • Head Height, Overall (Maximum): 0.163"
PRODUCT ATTRIBUTES
  • Category: Cap Screws
  • System of Measurement: Inch
  • Brand: Aspen Fasteners
  • Head Style: Hex Head
  • Head Style Detail: Washer Face
  • Head Markings: Material Grade Mark "BD"
  • Drive Style: External Hex Drive
  • Pitch: Fine Thread
  • Thread Direction: Right-Hand Thread
  • Point: Chamfered Point
  • Material: Steel
  • Material Grade: Alloy Steel ASTM A354 Grade BD
  • Coating: Zinc Plated and Baked
  • Coating Color: Yellow
  • Origin: Made in U.S.A.
  • Standards and Specifications: ASME B18.2.1.BH, DFARS
Product UPC Code:
692559447209
Shop by System of Measurement:
Inch
Material:
Steel
Head Style Detail:
Washer Face
Diameter (Nominal):
1/4"
System of Measurement:
Inch
Across Flats (Basic):
7/16"
specifications_document_url:
https://www.aspenfasteners.com/content/2D_PDF/product77/MI007-1428X312.PDF
Brand:
Aspen Fasteners
Coating Color:
Yellow
Shop by Material:
Steel
Thread Pitch:
28
Diameter (Minimum):
0.245"
Head Height, Overall (Maximum):
0.163"
Standards and Specifications:
ASME B18.2.1.BH, DFARS
cad_3d_file_url:
https://3d.aspenfasteners.com/assets/obj/MI007-1428X312.zip
Head Height, Overall:
0.1563"
Head Style:
Hex Head
Shop by Application:
Military Grade Fasteners
Diameter (Dimension):
0.25"
Thread Length (Nominal):
0.75"
Category:
Cap Screws
Thread Direction:
Right-Hand Thread
Across Flats (Maximum):
0.438"
Pitch:
Fine Thread
Origin:
Made in U.S.A.
Drive Style:
External Hex Drive
Product Class:
Externally Threaded Fasteners
Point:
Chamfered Point
Diameter (Maximum):
0.250"
Head Height, Overall (Minimum):
0.150"
Material Grade:
Alloy Steel ASTM A354 Grade BD
cad_3d_viewer_url:
https://3d.aspenfasteners.com/viewer/?cad_model=obj/MI007-1428X312
Head Markings:
Material Grade Mark "BD"
Length (Nominal):
3-1/2"
Across Flats (Minimum):
0.428"
Coating:
Zinc Plated and Baked
Order:
Machine Thread Fasteners
POS:
MI007-1428X312-000550
Print
  • Description
    • Military grade fasteners are DFARS compliant and made in North America. Certifications available.
    • Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
    • The washer face under the head provides a precision bearing surface.
    • The chamfered point improves engagement with a nut or pre-tapped hole.
    • In general, fine thread fasteners are about 10% stronger than coarse threads under static loading.
    DIMENSIONAL ATTRIBUTES
    • Diameter (Nominal): 1/4"
    • Thread Pitch: 28
    • Diameter (Dimension): 0.25"
    • Diameter (Minimum): 0.245"
    • Diameter (Maximum): 0.250"
    • Length (Nominal): 3-1/2"
    • Thread Length (Nominal): 0.75"
    • Across Flats (Basic): 7/16"
    • Across Flats (Minimum): 0.428"
    • Across Flats (Maximum): 0.438"
    • Head Height, Overall: 0.1563"
    • Head Height, Overall (Minimum): 0.150"
    • Head Height, Overall (Maximum): 0.163"
    PRODUCT ATTRIBUTES
    • Category: Cap Screws
    • System of Measurement: Inch
    • Brand: Aspen Fasteners
    • Head Style: Hex Head
    • Head Style Detail: Washer Face
    • Head Markings: Material Grade Mark "BD"
    • Drive Style: External Hex Drive
    • Pitch: Fine Thread
    • Thread Direction: Right-Hand Thread
    • Point: Chamfered Point
    • Material: Steel
    • Material Grade: Alloy Steel ASTM A354 Grade BD
    • Coating: Zinc Plated and Baked
    • Coating Color: Yellow
    • Origin: Made in U.S.A.
    • Standards and Specifications: ASME B18.2.1.BH, DFARS
    Product UPC Code:
    692559447209
  • 3D Product View

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