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.
- In general, fine thread fasteners are about 10% stronger than coarse threads under static loading.
- Diameter (Nominal): 1/4"
- Thread Pitch: 28
- Diameter (Dimension): 0.25"
- Diameter (Minimum): 0.245"
- Diameter (Maximum): 0.250"
- Length (Nominal): 5"
- 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: UNF Fine 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
Head Style Hex Head
Across Flats (Minimum) 0.428"
Brand Aspen Fasteners
Standards and Specifications ASME B18.2.1 and SAE J429
Head Height, Overall (Maximum) 0.163"
Drive Style External Hex Drive
Across Flats (Basic) 7/16"
POS BO022-1428X5-000400
Material Steel
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Thread Direction Right-Hand Thread
Product Class Externally Threaded Fasteners
Material Grade Grade 8
Diameter (Minimum) 0.245"
Diameter (Dimension) 0.25"
Pitch UNF Fine Thread
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-1428X5
Category Cap Screws
Order Machine Thread Fasteners
Diameter (Nominal) 1/4"
Head Style Detail Washer Face
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-1428X5.zip
System of Measurement Inch
Diameter (Maximum) 0.250"
Thread Length (Nominal) 0.75"
Thread Pitch 28
Length (Nominal) 5"
Coating Color Yellow
Head Height, Overall (Minimum) 0.150"
Point Chamfered Point
Origin Made in U.S.A.
Head Height, Overall 0.1563"
Across Flats (Maximum) 0.438"
Coating Zinc Plated
