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): 2-1/2"
- 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
Point Chamfered Point
Thread Length (Nominal) 0.75"
Thread Pitch 20
Category Cap Screws
Diameter (Maximum) 0.250"
Across Flats (Minimum) 0.428"
Pitch UNC Coarse Thread
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-1420X212
Head Height, Overall (Maximum) 0.163"
Diameter (Dimension) 0.25"
Coating Zinc Plated
Head Height, Overall (Minimum) 0.150"
Coating Color Yellow
Material Grade Grade 8
Diameter (Minimum) 0.245"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-1420X212.zip
System of Measurement Inch
Diameter (Nominal) 1/4"
Order Machine Thread Fasteners
Material Steel
Across Flats (Maximum) 0.438"
Product Class Externally Threaded Fasteners
Across Flats (Basic) 7/16"
Brand Aspen Fasteners
Drive Style External Hex Drive
Head Height, Overall 0.1563"
Origin Made in U.S.A.
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Head Style Hex Head
Head Style Detail Washer Face
Standards and Specifications ASME B18.2.1 and SAE J429
POS BO020-1420X212-000900
Length (Nominal) 2-1/2"
Thread Direction Right-Hand Thread
