Product Description
- Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
- The heads of grade 8 steel fasteners are typically marked with 6 raised radial lines.
- The washer face under the head provides a precision bearing surface.
- Grade 8 steel fasteners have a minimum tensile strength of 150,000 pounds per square inch.
- The chamfered point improves engagement with a nut or pre-tapped hole.
- Diameter (Nominal): 1/4"
- Thread Pitch: 20
- Diameter (Dimension): 0.25"
- Diameter (Minimum): 0.245"
- Diameter (Maximum): 0.250"
- Length (Nominal): 4-1/2"
- 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"
- Category: Cap Screws
- System of Measurement: Inch
- Brand: Aspen Fasteners
- Head Style: Hex Head
- Head Style Detail: Washer Face
- Head Markings: Six radial lines 60 degrees apart and manufacturer ID
- Drive Style: External Hex Drive
- Pitch: UNC Coarse Thread
- Thread Direction: Right-Hand Thread
- Point: Chamfered Point
- Material: Steel
- Material Grade: Grade 8
- Coating: Zinc Plated
- Coating Color: Yellow
- Origin: Made in U.S.A.
- Standards and Specifications: ASME B18.2.1 and SAE J429
Product Videos
Custom Field
Origin Made in U.S.A.
Diameter (Minimum) 0.245"
Thread Direction Right-Hand Thread
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-1420X412.zip
Category Cap Screws
Coating Color Yellow
Head Style Hex Head
Head Height, Overall 0.1563"
Diameter (Nominal) 1/4"
Drive Style External Hex Drive
Brand Aspen Fasteners
Across Flats (Maximum) 0.438"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-1420X412
Product Class Externally Threaded Fasteners
Standards and Specifications ASME B18.2.1 and SAE J429
Thread Pitch 20
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Diameter (Maximum) 0.250"
Coating Zinc Plated
Across Flats (Basic) 7/16"
Length (Nominal) 4-1/2"
System of Measurement Inch
Point Chamfered Point
Across Flats (Minimum) 0.428"
Head Height, Overall (Maximum) 0.163"
POS BO020-1420X412-000450
Material Steel
Thread Length (Nominal) 0.75"
Head Style Detail Washer Face
Material Grade Grade 8
Diameter (Dimension) 0.25"
Order Machine Thread Fasteners
Head Height, Overall (Minimum) 0.150"
Pitch UNC Coarse Thread
