1/4"-20 X 1/2" Hex Head Cap Screws Bolts, Coarse Thread, ASTM A354 Grade BD Alloy Steel, Yellow Zinc and Baked, B1821BH (supersedes MS90727F), DFARS

PART NUMBER:
MI006-1420X12-003300
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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.
DIMENSIONAL ATTRIBUTES
  • Diameter (Nominal): 1/4"
  • Thread Pitch: 20
  • Diameter (Dimension): 0.25"
  • Diameter (Minimum): 0.245"
  • Diameter (Maximum): 0.250"
  • Length (Nominal): 1/2"
  • Thread Length (Nominal): 0.5"
  • 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: Coarse 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:
692559445700
Across Flats (Basic):
7/16"
Across Flats (Maximum):
0.438"
Across Flats (Minimum):
0.428"
Brand:
Aspen Fasteners(r)
Category:
Cap Screws
Coating:
Zinc Plated and Baked
Coating Color:
Yellow
Diameter (Dimension):
0.25"
Diameter (Maximum):
0.250"
Diameter (Minimum):
0.245"
Diameter (Nominal):
1/4"
Drive Style:
External Hex Drive
Head Height, Overall:
0.1563"
Head Height, Overall (Maximum):
0.163"
Head Height, Overall (Minimum):
0.150"
Head Markings:
Material Grade Mark "BD"
Head Style:
Hex Head
Head Style Detail:
Washer Face
Length (Nominal):
1/2"
Material:
Steel
Material Grade:
Alloy Steel ASTM A354 Grade BD
Order:
Machine Thread Fasteners
Origin:
Made in U.S.A.
POS:
MI006-1420X12-003300
Pitch:
Coarse Thread
Point:
Chamfered Point
Product Class:
Externally Threaded Fasteners
Standards and Specifications:
ASME B18.2.1.BH, DFARS
System of Measurement:
Inch
Thread Direction:
Right-Hand Thread
Thread Length (Nominal):
0.5"
Thread Pitch:
20
cad_3d_file_url:
https://3d.aspenfasteners.com/assets/obj/MI006-1420X12.zip
cad_3d_viewer_url:
https://3d.aspenfasteners.com/viewer/?cad_model=obj/MI006-1420X12
specifications_document_url:
https://www.aspenfasteners.com/content/2D_PDF/product77/MI006-1420X12.PDF
Shop by Application:
Military Grade Fasteners
Shop by Material:
Steel
Shop by System of Measurement:
Inch
  • 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.
    DIMENSIONAL ATTRIBUTES
    • Diameter (Nominal): 1/4"
    • Thread Pitch: 20
    • Diameter (Dimension): 0.25"
    • Diameter (Minimum): 0.245"
    • Diameter (Maximum): 0.250"
    • Length (Nominal): 1/2"
    • Thread Length (Nominal): 0.5"
    • 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: Coarse 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:
    692559445700
  • 3D Product View

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